Dog Back Leg Problems: Causes, Diagnosis, and Treatment


Dog Back Leg Problems: Causes, Diagnosis, and Treatment

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Reviewed by a Licensed Veterinary Doctor (DVM)
Small Animal Neurology and Internal Medicine
This article is reviewed for clinical accuracy. Weakness or paralysis in a dog’s back legs (hindlimb paresis or plegia) is a neurological or orthopedic emergency until proven otherwise. The localization of the lesion – spinal cord, nerve roots, peripheral nerve, neuromuscular junction, or muscle – determines the treatment pathway and prognosis. Early, accurate diagnosis dramatically changes outcomes, particularly for compressive spinal cord disease where surgery within 24-48 hours of acute onset is the strongest determinant of recovery.

Key Takeaways

  • Hindlimb weakness (paresis) or complete inability to use the back legs (plegia) can originate from four anatomical regions: the spinal cord (intervertebral disc disease, degenerative myelopathy, fibrocartilaginous embolism, neoplasia, trauma), the nerve roots (lumbosacral stenosis), the peripheral nerves, or the muscles and neuromuscular junction (tick paralysis, botulism, myopathy). The presenting signs overlap considerably but can be distinguished by a systematic neurological examination, and this localization determines treatment. Treatment aimed at the wrong region provides no benefit.
  • Intervertebral disc disease (IVDD) is the most common cause of acute back leg weakness in dogs. The thoracolumbar junction (T11-L3) is the most frequently affected region, producing hindlimb paresis or plegia with intact front limb function. Hansen Type I IVDD (disc extrusion – sudden expulsion of nucleus pulposus into the spinal canal) is typical in chondrodystrophic breeds: Dachshunds, Beagles, Corgis, Pekingese, Basset Hounds, French Bulldogs, and Shih Tzus. Hansen Type II (disc protrusion – slow annular bulging) is more common in large breeds (German Shepherd, Labrador, Dalmatian) and produces gradually progressive hindlimb weakness over months to years. MRI is the gold standard for diagnosis; CT myelography is an alternative. Surgical decompression (hemilaminectomy or dorsal laminectomy) within 24-48 hours of acute onset in a dog that retains deep pain perception produces recovery in 85-95% of cases. Dogs that have lost deep pain perception have a worse prognosis (approximately 50-60% recovery with surgery), and surgery beyond 48 hours of loss of deep pain further reduces recovery rates.
  • Degenerative myelopathy (DM) is a progressive, fatal, non-painful spinal cord degeneration caused by a mutation in the SOD1 gene. It is the most common cause of slowly progressive, symmetric hindlimb weakness in dogs over 8 years of age in predisposed breeds: German Shepherd Dogs, Boxers, Pembroke Welsh Corgis, Chesapeake Bay Retrievers, and Rhodesian Ridgebacks. There is no effective treatment to halt progression. Physiotherapy and hydrotherapy slow functional decline and may extend ambulatory life by several months. DM progresses to complete paraplegia within 6-24 months of onset; forelimb involvement, dysphagia, and respiratory muscle weakness follow terminal stages. Definitive diagnosis requires post-mortem histopathology; genetic testing identifies dogs at risk (homozygous SOD1:c.118G>A).
  • Fibrocartilaginous embolism (FCE) is the sudden occlusion of spinal cord vasculature by fibrocartilaginous material (presumed origin: nucleus pulposus), producing peracute (seconds to minutes) onset of hindlimb or hemilateral weakness without spinal pain after recovery from the initial insult. FCE is non-progressive after the first few hours and is typically non-painful on spinal palpation – distinguishing it from IVDD. Large and giant breeds (Labrador, German Shepherd, Great Dane, Rottweiler) and some toy breeds (miniature Schnauzer) are predisposed. MRI shows a hyperintense intraparenchymal spinal cord lesion. Treatment is supportive; recovery is variable (partial to complete in many cases over 4-12 weeks) and correlates with lesion severity.
  • Lumbosacral stenosis (degenerative lumbosacral stenosis, cauda equina syndrome) causes hindlimb weakness via compression of the nerve roots of the cauda equina (L6, L7, S1-S3) rather than the spinal cord itself, producing a lower motor neuron (LMN) picture: weak, hypotonic hindlimbs with reduced or absent patellar and withdrawal reflexes, tail weakness, urinary and fecal incontinence, and pronounced pain on dorsal pressure over the lumbosacral junction. Large breeds – German Shepherd, Labrador, Golden Retriever, Rottweiler – are most commonly affected. MRI or CT myelography confirm the diagnosis. Treatment: medical management (restriction, NSAIDs, epidural corticosteroids) for mild cases; surgical decompression (dorsal laminectomy + foraminotomy) for refractory or severe cases.

When a dog’s back legs stop working correctly – stumbling on walks, knuckling over paws, dragging a limb, or suddenly collapsing – the range of possible causes spans from a slipped spinal disc that responds dramatically to surgery to a slow genetic degeneration for which there is no cure. The physical signs often look similar. The path forward is completely different depending on the source. This guide walks through the major causes, how they are distinguished, what treatment looks like, and what the evidence says about recovery.

Neurological Anatomy: Where Is the Problem?

Accurate localization of the lesion is the first step in every case of hindlimb weakness. The spinal cord has two functional zones relevant here:

  • Upper motor neuron (UMN) lesion (spinal cord lesion between T3 and L3): produces increased muscle tone in the hindlimbs (spastic paresis), exaggerated or normal spinal reflexes (patellar, withdrawal), and voluntary motor deficits. The hindlimbs may feel stiff and move in an abnormal, scissoring or crossing pattern. UMN lesions point toward thoracolumbar IVDD, degenerative myelopathy, FCE, or spinal cord tumor.
  • Lower motor neuron (LMN) lesion (spinal cord lesion at L4-S3, or peripheral nerve, neuromuscular junction, or muscle): produces reduced muscle tone (flaccid paresis), decreased or absent spinal reflexes, rapid muscle atrophy (within 5-7 days), and voluntary motor deficits. LMN lesions point toward lumbosacral disease, peripheral neuropathy, tick paralysis, or myopathy.

A dog with UMN hindlimb weakness typically has brisk knee-jerk (patellar) and withdrawal reflexes, whereas a dog with LMN hindlimb weakness has absent or depressed reflexes. This one observation significantly narrows the differential diagnosis before any imaging.

Causes of Hindlimb Weakness: Diagnosis and Treatment Table

Condition Onset & Pain Key Examination Findings Most Affected Breeds Diagnosis Treatment
IVDD – Hansen Type I (disc extrusion) Acute to peracute (hours); spinal pain present at onset; pain may resolve as cord compression worsens UMN signs (T3-L3 lesion): spastic hindlimbs, intact or exaggerated reflexes; ataxia; grading I-V (Grade I = pain only; Grade V = no deep pain) Dachshund (most common), Beagle, Corgi, Pekingese, Basset Hound, French Bulldog, Shih Tzu MRI (gold standard); CT myelography; plain radiograph (calcified disc) Grade I-II: strict cage rest 4-6 weeks + methylprednisolone sodium succinate 30 mg/kg IV within 8h of onset (controversial); Grade III-V: surgical decompression (hemilaminectomy) within 24-48h; prognosis best if deep pain intact
IVDD – Hansen Type II (disc protrusion) Insidious, months to years; mild discomfort Progressive UMN hindlimb weakness; ataxia; may have episodic worsening German Shepherd, Labrador, Dalmatian, large breeds over 5 years MRI (disc bulge with cord compression); CT Medical (NSAIDs, physiotherapy) for mild/moderate; surgical decompression for progressive or severe cases; slower recovery than Type I
Degenerative myelopathy (DM) Insidious, months to years; non-painful Symmetric progressive UMN hindlimb ataxia and weakness; absent pain response; no spinal hyperpathia; progresses to paraplegia then tetraplegia; urinary incontinence in late stages German Shepherd, Boxer, Pembroke Welsh Corgi, Chesapeake Bay Retriever, Rhodesian Ridgeback; age over 8 years SOD1 gene mutation testing (homozygous at-risk); MRI to exclude compressive disease; definitive diagnosis = post-mortem histopathology No effective disease-modifying therapy; physiotherapy (underwater treadmill, passive ROM, muscle strengthening) extends ambulatory life 3-6 months; mobility carts for quality of life; euthanasia discussion when respiratory function compromised
Fibrocartilaginous embolism (FCE) Peracute (seconds during activity or mild trauma); brief pain at onset, then non-painful; non-progressive after 24h Unilateral or bilateral hindlimb weakness/paresis; UMN signs if T3-L3; asymmetric deficits possible (hemilateral); no spinal hyperalgesia after acute phase Labrador, German Shepherd, Great Dane, Rottweiler, Bernese Mountain Dog; also miniature Schnauzer in small breeds MRI (intraparenchymal hyperintense lesion on T2, no compression); CSF analysis (elevated protein possible) Supportive; intensive physiotherapy; corticosteroids not proven beneficial; recovery variable – 60-75% achieve functional ambulation within 4-12 weeks; prognosis better if non-ambulatory but pain-perceiving
Lumbosacral stenosis (cauda equina syndrome) Gradual progression; pronounced pain on lumbosacral palpation; worse with stairs, jumping LMN signs: hypotonic hindlimbs, reduced patellar and withdrawal reflexes, tail weakness, anal tone reduced; urinary and fecal incontinence; hind paw dragging; bilateral or asymmetric German Shepherd (most common); Labrador, Golden Retriever, Rottweiler; large breeds 5-8 years MRI (L7-S1 disc protrusion, stenosis, nerve root compression); CT; flexion-extension radiographs Medical: 6-8 weeks strict rest + NSAIDs (meloxicam 0.1 mg/kg/day or carprofen 4.4 mg/kg/day) + epidural methylprednisolone 40-80 mg; surgical: dorsal laminectomy + foraminotomy for non-responders or severe cases; 80-90% post-surgical improvement
Spinal cord neoplasia Progressive over weeks to months; may have episodes of rapid worsening; variable pain UMN or LMN signs depending on location; atrophy in LMN lesion; signs may be asymmetric; systemic signs if metastatic German Shepherd (meningioma), Golden Retriever (neurofibrosarcoma), Boxer (lymphoma); older dogs MRI with contrast (intradural-extramedullary, extradural, or intramedullary enhancement); CSF cytology; CT-guided biopsy Surgical resection if accessible; palliative radiation therapy; corticosteroids for edema; prognosis depends on tumor type (meningioma resection offers long-term control; intramedullary tumors carry poor prognosis)
Tick paralysis Acute ascending LMN flaccid paralysis developing 5-9 days after tick attachment; progresses within 24-72 hours Ascending flaccid tetraparesis starting in hindlimbs; absent reflexes; rapid progression; normal consciousness; possible respiratory muscle paralysis Any breed; any age; requires engorged female tick (Dermacentor variabilis, D. andersoni in North America); tick must be found and removed Clinical history + tick search (engorged female in skin folds, ear canal, between toes, perianal region); improvement within 24-72h of tick removal is diagnostic Find and remove tick immediately (do not squeeze – use fine-tipped tweezers at skin level); supportive care and ventilatory support if respiratory compromise; most dogs recover fully within 24-72 hours of tick removal
Hip dysplasia Gradual; pain-driven reluctance to use hindlimbs; worsens with exercise Bunny hopping gait; reluctance to rise or climb stairs; muscle atrophy over hindquarters; crepitus and reduced range of motion on hip manipulation; Ortolani sign positive in young dogs German Shepherd, Labrador, Golden Retriever, Rottweiler, Saint Bernard, Bulldog Hip radiographs under sedation (OFA or PennHIP scoring); Ortolani test Medical: weight management + NSAIDs + joint supplements (UC-II collagen, omega-3 EPA/DHA) + physiotherapy; surgical: juvenile pubic symphysiodesis under 20 weeks, triple pelvic osteotomy under 12 months, total hip replacement in adults; femoral head ostectomy as salvage

IVDD Severity Grading and Treatment Decisions

The Modified Frankel / Olby grading system for thoracolumbar IVDD is the standard framework guiding treatment decisions:

  • Grade I: Spinal pain only; ambulatory; no neurological deficits. Treatment: strict cage rest 4-6 weeks; NSAIDs; most dogs recover without surgery but 30-40% relapse within 2 years
  • Grade II: Ambulatory hindlimb paresis with ataxia; dog can walk but stumbles or crosses paws. Treatment: cage rest + NSAIDs; surgery if not improving in 48-72 hours; prognosis excellent with conservative or surgical management
  • Grade III: Non-ambulatory paresis; dog cannot walk but has voluntary hindlimb movement; bladder control variable. Treatment: surgical decompression strongly recommended; recovery rate 85-95%
  • Grade IV: Paralysis (no voluntary movement) with intact deep pain perception. Treatment: surgical decompression within 24-48 hours critical; recovery rate 85-95% with prompt surgery
  • Grade V: Paralysis without deep pain perception (pin prick to digits produces no conscious response). Treatment: surgical decompression as quickly as possible; recovery rate approximately 50-60% if surgery within 24h; drops substantially after 48h of absent deep pain; prognosis significantly worse than Grades I-IV

Deep pain testing: firm pressure is applied to a digit (toe bone) using hemostatic forceps or firm finger pressure; conscious perception is indicated by behavioral response (turning head, vocalization) rather than spinal reflex withdrawal (which is preserved even with complete cord transection). Withdrawal without behavioral response does NOT indicate intact deep pain.

Degenerative Myelopathy: What Owners Need to Know

DM is one of the most emotionally difficult diagnoses in veterinary neurology because it is invariably progressive, there is no treatment to slow or halt the disease, and affected dogs typically remain mentally bright and engaged as their bodies fail. Understanding the disease course helps owners make appropriate quality-of-life decisions:

  • Stage 1 (6-12 months): Symmetric hindlimb ataxia; scuffing paws on walks; worn nails on hind paws; stumbling on uneven surfaces; weak on stairs; no pain
  • Stage 2 (3-6 months further): Progressive hindlimb weakness; difficulty rising from rest; unable to maintain standing posture; urinary and fecal incontinence begins; dog remains alert
  • Stage 3 (2-6 months further): Complete hindlimb paralysis (paraplegia); forelimb weakness begins; trunk muscle involvement; mobility cart (wheelchair) extends ambulatory life
  • Stage 4 (final): Forelimb weakness (tetraplegia); dysphagia; respiratory muscle weakness; quality of life severely compromised

Physiotherapy in Stage 1-2 significantly slows progression. An underwater treadmill 3-5 sessions per week with certified canine physiotherapist (CCRT) is the most evidence-supported intervention. Dogs participating in structured exercise programs remain ambulatory significantly longer than those with no rehabilitation. Nursing care for incontinent dogs includes padded bedding, turning every 2-4 hours to prevent pressure sores, and diligent hygiene. The SOD1 gene test (from a cheek swab) identifies homozygous at-risk dogs before symptoms appear, allowing owners of predisposed breeds to plan proactively.

Post-Surgical Rehabilitation for Spinal Cord Disease

Surgical decompression removes the mechanical cause of cord compression but does not instantly restore function. Structured rehabilitation is essential to maximize recovery:

  • Weeks 1-2 post-surgery: Strict rest; bladder expression every 4-6 hours if urinary retention present (3-finger rule: bladder should be emptied when palpable as a golf ball or larger); wound care; passive range-of-motion exercises 3-4 times daily; assess for deep pain recovery; stand-assisted exercises for short periods
  • Weeks 3-6: Physiotherapy begins – cart-assisted walking, underwater treadmill (hydrotherapy removes 60-90% of body weight, allowing limb movement patterns without overloading recovering cord); balance board exercises; neuromuscular electrical stimulation (NMES) to maintain muscle mass
  • Weeks 6-16: Progressive ambulation training; transition from assisted walking to independent steps; land treadmill; obstacle courses; incline walking; continue hydrotherapy
  • Nursing care throughout: Turn non-ambulatory dogs every 2-4 hours to prevent pressure sores over bony prominences (hips, hocks); use pressure-redistribution foam bedding; check for urine scald daily and keep skin dry; monitor for urinary tract infection (common in dogs with urinary retention – urinalysis with culture every 4-8 weeks); enrofloxacin 5-20 mg/kg/day PO or trimethoprim-sulfamethoxazole 15 mg/kg BID if UTI confirmed

Emergency: When Back Leg Problems Require Immediate Veterinary Care

  • Sudden, complete inability to use both back legs with no prior warning signs – this is an emergency requiring same-day evaluation; acute disc extrusion is a time-sensitive condition where surgical outcomes worsen significantly with delay beyond 24-48 hours
  • Paralysis accompanied by loss of bladder or bowel control – indicates severe spinal cord compression or lumbosacral nerve root compression; urinary retention that is not managed causes bladder atony (permanent stretch damage to the detrusor muscle) within days
  • Absence of deep pain perception in the hind paws – testing this at home by applying firm pressure to a toe bone and checking for behavioral response; absent deep pain is a neurological emergency with a closing window for surgical success
  • Ascending weakness – weakness starting in the back legs and spreading forward toward the front legs within hours to days suggests tick paralysis (find and remove the tick immediately) or Guillain-Barre-like acute polyradiculoneuritis; respiratory compromise may follow
  • Any episode of back leg weakness in a chondrodystrophic breed (Dachshund, French Bulldog, Pekingese, Corgi, Basset Hound) following sudden movement, yelping, or jumping – these breeds have calcified discs that can extrude acutely with little warning; even apparently mild episodes should be evaluated to identify whether disc material is impinging the cord

Age-Specific Considerations

Puppies and Young Adults (Under 3 Years)

  • Progressive hindlimb weakness in a puppy from a large or giant breed that worsens with exercise but resolves with rest suggests exercise-induced collapse (EIC) – a mutation in the DNM1 gene common in Labrador Retrievers; EIC causes acute collapse after intense exercise due to muscle weakness, not spinal disease; genetic testing confirms; affected dogs live normal lives with exercise restriction
  • Wobbly, wide-based hindlimb gait starting at 3-6 months in Rottweilers, Dobermans, or Bassett Hounds may indicate progressive juvenile polyneuropathy or sensory neuropathy; MRI and nerve conduction studies differentiate from spinal disease
  • Acute hindlimb weakness after trauma (road traffic accident, fall from height) – evaluate for traumatic disc extrusion, vertebral fracture/luxation; radiograph before moving to assess spinal stability; transport with rigid board if fracture suspected

Middle-Aged Adults (3-8 Years)

  • This is the peak age for Hansen Type I IVDD in chondrodystrophic breeds; any acute hindlimb dysfunction in a 3-7 year-old Dachshund, French Bulldog, or Corgi should be presumed IVDD until proven otherwise and managed as a potential emergency
  • Gradually progressive hindlimb weakness with pronounced lumbosacral pain in a 5-8 year-old German Shepherd or Labrador points toward degenerative lumbosacral stenosis; these dogs often resent having their tail raised or hips palpated and may show pain only after exercise
  • FCE is most common in active, otherwise healthy large-breed dogs in this age range; the sudden onset during running or play, brief yelp, then non-painful weakness is a characteristic history that should be described to the veterinarian precisely – it significantly aids diagnosis

Senior Dogs (8+ Years)

  • Progressive symmetric hindlimb weakness with worn hind nails and absent pain in a German Shepherd, Boxer, or Corgi over 8 years old is the classic DM presentation; in the absence of compressive spinal disease on MRI, DM is the working diagnosis; SOD1 gene testing and an honest discussion about the disease course and timeline are priorities
  • Hansen Type II IVDD in large breeds typically presents in older dogs (over 5-7 years) as insidious hindlimb weakness that owners may initially attribute to “just getting old”; large-breed dogs showing subtle hindlimb dysfunction deserve spinal imaging rather than dismissal as age-related change
  • New-onset hindlimb weakness in any senior dog with systemic signs (weight loss, lethargy, reduced appetite) warrants oncologic workup; spinal lymphoma, meningioma, osteosarcoma of the vertebra, and metastatic carcinoma (mammary, prostate, transitional cell carcinoma) can all produce compressive myelopathy in older dogs

Myths About Dog Back Leg Problems

Myth

If my dog’s back legs are weak but they can still walk a little, it will probably get better on its own with rest.

Fact

Mild ambulatory paresis (Grade II IVDD) can improve with strict cage rest, but unmonitored “rest at home” while the dog continues to move around the house is not adequate treatment and risks rapid progression to non-ambulatory paresis or paralysis. More critically, if disc material continues to compress the spinal cord during the “wait and see” period, the window for successful surgical intervention narrows. Any dog with new hindlimb weakness should be evaluated by a veterinarian within 24 hours, not monitored at home for several days first.

Myth

A dog that can’t walk due to back leg paralysis has no quality of life and euthanasia is the only option.

Fact

Dogs with permanent or prolonged hindlimb paralysis can live fulfilling lives with appropriate support. Mobility carts (dog wheelchairs) allow paraplegic dogs to run, play, and explore. Bladder expression or catheterization can be managed by dedicated owners with veterinary instruction. Studies and clinical experience consistently show that dogs adapt remarkably well to hindlimb paralysis – they do not grieve the absence of their hind legs the way humans might expect. Quality of life assessment should focus on pain, ability to express natural behaviors, appetite, and social engagement – not on the paralysis itself. Many paraplegic dogs are highly engaged, pain-free, and enjoy excellent quality of life for years.

Myth

Degenerative myelopathy is just like a dog’s version of multiple sclerosis, so the same treatments that help humans with MS should help dogs too.

Fact

DM is pathologically more similar to amyotrophic lateral sclerosis (ALS) than to MS; both involve axonal degeneration rather than demyelination, and both share the SOD1 mutation that is common in familial human ALS. MS is an autoimmune, episodic, demyelinating disease responsive to immunosuppression – DM does not respond to immunosuppressive therapy. DM produces progressive, symmetric, ascending motor degeneration without the relapsing-remitting pattern of MS. Human ALS drugs (riluzole) have been investigated in DM but have not shown significant benefit in controlled trials. The most effective current intervention remains structured physical rehabilitation.

Frequently Asked Questions

Why are my dog’s back legs suddenly weak?

Sudden hindlimb weakness is most commonly caused by intervertebral disc disease (IVDD) – a slipped or ruptured spinal disc compressing the spinal cord. In chondrodystrophic breeds (Dachshund, French Bulldog, Corgi, Beagle, Basset Hound), this is an emergency requiring same-day veterinary evaluation. Fibrocartilaginous embolism (spinal cord stroke) and acute spinal trauma are other causes of sudden onset. Do not wait to see if it resolves – the window for effective surgical treatment narrows within hours to days.

What causes progressive back leg weakness in older dogs?

The two most common causes in senior dogs are degenerative myelopathy (a progressive genetic spinal cord degeneration with no cure, common in German Shepherds, Boxers, and Corgis) and Hansen Type II IVDD (slow disc bulging compressing the cord, most common in large breeds). Lumbosacral stenosis (cauda equina compression), spinal neoplasia, and hip dysplasia with muscle atrophy are also important. MRI distinguishes these conditions – the treatment and prognosis differ substantially, so imaging is essential rather than treating empirically.

Can a dog recover from back leg paralysis?

Recovery depends entirely on the cause and severity. IVDD dogs with intact deep pain that receive surgical decompression within 24-48 hours of acute onset recover in 85-95% of cases. Dogs that have lost deep pain recover in approximately 50-60% with prompt surgery, dropping significantly after 48 hours. FCE dogs often achieve functional recovery within 4-12 weeks of supportive care. DM is always progressive with no recovery. For dogs that do not regain full function, mobility carts, bladder management, and physiotherapy provide good quality of life.

How do I know if my dog has IVDD or degenerative myelopathy?

Key distinguishing features: IVDD typically has spinal pain at some point in the course, acute or subacute onset, and may be asymmetric; DM is non-painful, slowly progressive over months to years, symmetric, and typically begins in dogs over 8 years of age in predisposed breeds. However, these features overlap and MRI is necessary to definitively distinguish them by showing or excluding spinal cord compression. SOD1 gene testing can identify at-risk DM dogs before symptoms appear. Do not rely on home assessment alone – accurate diagnosis requires veterinary examination and imaging.

Should I massage my dog’s back legs if they are weak?

Light massage (effleurage – gentle stroking) and passive range-of-motion exercises are appropriate for maintaining muscle tone in dogs with hindlimb weakness, provided the underlying cause is known and the spine is stable. For dogs with acute IVDD, unsupervised manipulation risks worsening cord compression – physiotherapy should be directed by a certified canine rehabilitation therapist (CCRT) and not started until the veterinarian confirms it is safe. For DM, structured physiotherapy including massage, passive ROM, and hydrotherapy is one of the few interventions that delays progression and is strongly recommended.

What is the prognosis for a dog with degenerative myelopathy?

DM is invariably progressive and ultimately fatal. From first signs of hindlimb ataxia, most affected dogs progress to paraplegia within 6-24 months without intervention. With intensive physiotherapy (underwater treadmill 3-5 times weekly), ambulatory life can be extended by several months beyond the untreated course. Affected dogs eventually progress to forelimb involvement and respiratory muscle weakness in the terminal stage. The disease is non-painful throughout. Most owners choose euthanasia when the dog can no longer maintain hygiene, when forelimb weakness prevents mobility cart use, or when quality of life is significantly compromised. The decision should be made with the veterinarian using objective quality-of-life assessment tools.

What breeds are prone to back leg problems?

Chondrodystrophic breeds are most prone to IVDD (disc extrusion): Dachshund, French Bulldog, Corgi, Beagle, Pekingese, Basset Hound, Shih Tzu. Breeds prone to degenerative myelopathy: German Shepherd, Boxer, Pembroke Welsh Corgi, Chesapeake Bay Retriever, Rhodesian Ridgeback. Large breeds prone to lumbosacral stenosis: German Shepherd, Labrador Retriever, Rottweiler. Breeds prone to hip dysplasia contributing to hindlimb weakness: German Shepherd, Labrador, Golden Retriever, Saint Bernard, Bulldog. FCE is most common in large and giant breeds (Labrador, Rottweiler, Great Dane, Bernese Mountain Dog).

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