"My older dog has arthritis — what actually helps?"

Arthritis in dogs is joint cartilage breaking down — and the pain is real

Osteoarthritis — the form almost all aging dogs develop — is a progressive disease in which the smooth cartilage cushioning the ends of bones gradually wears away. Without that buffer, bone begins to grind against bone. The joint responds by producing excess fluid and forming bony growths called osteophytes, which further restrict comfortable movement. This isn't stiffness from "getting old" in some vague sense; it's a structural, inflammatory process producing genuine, measurable pain. Dogs simply can't tell you how much they hurt, which is why the signs are often misread as laziness or slowing down with age.

Inflammation is the fuel that keeps the pain cycle going. Damaged cartilage releases inflammatory chemicals that irritate the joint lining, which produces more fluid, which stretches the joint capsule, which causes more pain. That cycle tends to worsen in cold or damp weather, after periods of rest, and following unusual exercise — which is why your dog may seem fine on the couch and visibly stiff getting up from it. Large and giant breeds, overweight dogs, and dogs with prior joint injuries or developmental problems like hip dysplasia are at significantly elevated risk, but arthritis can appear in any breed at any age.

The good news — and there is real good news — is that while arthritis cannot be reversed, its progression can be meaningfully slowed and its day-to-day impact substantially reduced. The key is matching the right combination of interventions to your dog's specific situation, rather than relying on any single supplement or drug. That combination almost always includes more than one approach working together.

Arthritis doesn't look the same in every dog

The same underlying joint disease can show up very differently depending on which joints are affected, how far it's progressed, and your dog's individual pain tolerance — which varies enormously.

Untreated arthritis pain compounds — and it affects more than mobility

Arthritis that goes unmanaged doesn't stay the same — it progresses. Chronic pain changes dogs behaviourally over time: they become less active (which accelerates muscle loss and weight gain, which in turn puts more pressure on already compromised joints), they sleep more poorly, they eat less consistently, and they often show personality changes that owners attribute to "just getting old." What's actually happening is that the dog is in sustained, unrelieved pain. Research in veterinary pain management is unambiguous that undertreating chronic pain leads to neurological sensitisation — the animal's pain system becomes wound up and begins amplifying signals, a state called central sensitisation that makes pain harder to manage the longer it is left untreated.