Signs to watch for.
Here's what owners report most often:
- Stiffness after rest that loosens with movement - Difficulty rising, sitting, or lying down - Reluctance to climb stairs, jump, or play - Visible limping or favoring a leg - Loss of muscle mass, especially in hindquarters - Behavioral changes — irritability, withdrawal, snapping when touched - Slower walks and reduced stamina - Audible joint clicks or pops
Common causes.
Age-related cartilage wear. Decades of joint use thin the cartilage that cushions bone-on-bone contact, leaving rough, inflamed surfaces.
Hip or elbow dysplasia. Joints that are malformed from birth wear unevenly, accelerating the path to full arthritis.
Previous joint injury. Cruciate tears, fractures, and dislocations leave joints mechanically compromised and prone to early arthritis.
Obesity. Carrying extra weight for years multiplies joint load and produces inflammatory signals that speed cartilage breakdown.
Breed predisposition. Large breeds, working breeds, and certain conformations carry higher genetic risk regardless of lifestyle.
How to tell early arthritis from normal aging
Arthritis is often mistaken for "just getting old." Both can look similar from across the room. The difference is that arthritis is specifically about joints — stiffness after rest, hesitation before stairs, slower starts in the morning. Normal aging is more general and does not typically produce focal lameness or pain on touch.
A useful at-home check: watch how your dog gets up from lying down. A healthy dog rises smoothly. An arthritic dog often stretches first, shifts weight to the front, and pushes up in stages. The first 30 seconds of walking are usually stiff, then loosens as joints warm up.
What causes it
Arthritis is the end result of cartilage damage that has accumulated over time. Cartilage covers the ends of bones inside joints and acts as a cushion. As it thins and roughens, bone surfaces grind, the joint becomes inflamed, and the inflammation itself produces more damage. It is a slow-motion cycle.
The causes upstream are usually genetic predisposition, past injury, dysplasia, or sustained obesity. Dogs who arrive at arthritis in their senior years almost always have one or more of these in their history — sometimes going back to puppyhood.
How to address it at home
Three pillars hold up at-home arthritis care. The first is weight — even a small reduction (5-10%) makes a measurable difference in pain and mobility scores. The second is movement, which sounds counterintuitive but is essential. Joints need consistent low-impact use to stay lubricated and supported by surrounding muscle. Short, regular walks beat long sporadic ones. Swimming is excellent.
The third is joint support. Glucosamine, chondroitin, MSM, and omega-3s are the four ingredients with the most clinical evidence for canine joint health. They reduce inflammation, support cartilage maintenance, and improve daily comfort. They work alongside vet-prescribed NSAIDs and other pain medications in moderate-to-severe cases — not in place of them.
Long-term management
Arthritis is managed for life, not cured. Expect to layer interventions as the condition progresses. Early stages may need only supplements, weight management, and lifestyle changes. Mid-stage often adds NSAIDs as needed and physical therapy. Advanced stages can involve injections, laser therapy, or surgical consultation.
House modifications help more than owners expect. Non-slip rugs on slick floors, a ramp instead of stairs to the car, a thicker bed that does not require lowering all the way to the ground — these small changes preserve mobility and reduce daily pain.
When to see your vet.
See your vet at the first signs of stiffness or limping — earlier intervention slows progression. Get back in touch if pain worsens suddenly, your dog cannot bear weight on a limb, or quality of life declines despite current treatment. Arthritis often requires prescription pain relief alongside supplements, and your vet is the right person to manage that.