Joint Disease in Dogs: Osteoarthritis Welfare and Management

Canine Osteoarthritis: A Major Welfare Challenge

Osteoarthritis (OA) — the progressive degeneration of joint cartilage and surrounding structures — is the most common chronic pain condition in dogs. An estimated 20–35% of all dogs are affected, rising to over 80% in dogs over 8 years. Despite this extraordinary prevalence, OA is chronically underdiagnosed and undertreated: studies consistently show that owners attribute pain signs to "normal ageing," and that the majority of affected dogs receive inadequate analgesia. Addressing this recognition and treatment gap is one of the most impactful welfare interventions in companion animal care.

Pathophysiology

OA develops through degradation of articular cartilage, synovial inflammation, subchondral bone changes, and osteophyte (bone spur) formation. The result is a painful joint with reduced range of motion and chronic inflammation. OA is typically secondary to:

Developmental joint disease (hip dysplasia, elbow dysplasia, osteochondrosis)
Previous trauma or injury
Repetitive strain (working dogs, overweight dogs)
Body weight excess — obesity is the most modifiable risk factor

Recognising OA in Dogs

Dogs rarely vocalise from joint pain. Owners should watch for:

Stiffness on rising — particularly after rest
Reduced willingness to exercise or shortened walks
Reluctance to climb stairs, jump into car, or access elevated areas
Gait changes — favouring a limb, bunny hopping (both hindlimbs together)
Licking or chewing a joint
Irritability when touched around affected area
Changes in personality — grumpier, less interactive
Muscle wastage around affected joint

The Canine Brief Pain Inventory (CBPI) — a validated owner questionnaire — provides structured assessment of pain severity and interference with activities.

Diagnosis

Orthopaedic examination: Gait assessment, joint palpation, range of motion testing
Radiography: Confirms OA changes (osteophytes, joint space narrowing, subchondral sclerosis)
Force plate analysis: Objective measurement of weight-bearing in research/specialist settings
CT/MRI: For complex joints (elbow, spine)

Management: Multimodal Approach

Weight Management

The single most impactful intervention for OA dogs. Studies show 5–10% body weight reduction significantly improves lameness scores. Target body condition score 4–5/9. Prescription weight management diets with enhanced omega-3 content support both weight loss and joint inflammation reduction.

Pharmaceutical Analgesia

NSAIDs (meloxicam, carprofen, grapiprant): First-line; reduce inflammation and pain. Requires kidney and liver monitoring for long-term use. Essential for moderate-severe OA
Gabapentin: Neuropathic pain component; often added to NSAID therapy
Amantadine: NMDA antagonist; reduces central sensitisation in chronic pain
Grapiprant (Galliprant): Newer NSAID mechanism (EP4 receptor antagonist); promising safety profile in elderly dogs
Bedinvetmab (Librela): Monthly injection; anti-NGF antibody; newest approach — direct pain pathway targeting

Physical Rehabilitation

Hydrotherapy: Low-impact exercise maintaining muscle mass without joint loading; excellent welfare benefit
Physiotherapy: Passive range of motion exercises, massage, targeted strengthening
Laser therapy: Reduces inflammation and pain in some dogs

Environmental Modification

Orthopaedic memory foam beds
Non-slip flooring (yoga mats on slippery floors)
Ramps for car, sofa, bed access
Raised food and water bowls for spinal OA