Why a lean old dog moves better — and how to get there

Every extra pound on an arthritic dog crosses those joints thousands of times a day. You cannot buy that load off with a bed or a supplement — and unlike almost everything else on this site, taking it off costs nothing.

Cornell's Riney Canine Health Center lists weight control among the lifestyle changes for managing canine osteoarthritis, and the AKC puts it bluntly: weight management is prime for an arthritic dog, because excess weight strains the joints. Neither is a controversial position. It is simply the least commercial one, which is why it gets less attention than the gear.

The study everyone quotes, quoted properly

Purina ran a 14-year life span study on 48 Labrador Retrievers, paired within their litters. One group was fed freely; the other was fed 75 percent of what its paired littermate ate. The lean-fed dogs had a median life span of 13 years against 11.2 years for the control group — an extension Purina describes as 15 percent, or nearly two years.

Two years, from feeding less. No supplement on this site can make a claim within sight of that, and we sell supplements. It is worth sitting with that number before the next time the dog looks at you during dinner.

Score the dog, not the scale

A number on the vet's scale means nothing without context, and it lies particularly badly about old dogs — a senior losing muscle over the hips while gaining fat over the ribs can hold a steady weight for a year while its body composition quietly gets worse. What you want instead is a body condition score, which you take with your hands.

VCA describes two scales in common use — a 5-point and a 9-point — with the ideal being 3 out of 5 or 5 out of 9. Three checks get you there:

VCA's wording for an ideal dog is worth holding onto: the curves should be "obvious, but not severe". A dog whose ribs you can see from across the room has gone too far the other way, and for a senior that matters — muscle is what holds a bad joint together.

Doing it without starving the muscle

Get a target from your vet, not from a chart

Breed weight ranges are averages across a population, and your dog is not an average. Ask your vet for a target weight and a rate to get there at your dog's next check, and have them score your dog with you so you can feel what a five out of nine feels like on your own dog. Then repeat the scoring at home every few weeks.

Measure the food, and count everything

Most overfeeding is not deliberate — it is a scoop that has grown, a second person in the house who also feeds, and treats that nobody is counting. Weigh or measure meals properly for a fortnight and write down every extra. The arithmetic usually explains itself without anyone having to be blamed.

Keep the treats, change what they are

A senior dog who has lost the walk, the ball and the stairs should not also lose the biscuit. Break treats into smaller pieces — dogs count events, not grams — and ask your vet which vegetables suit your dog if you want volume without calories. Training treats for an old dog can be tiny and still work.

Move what you can, gently

Diet does the heavy lifting, but movement protects the muscle you do not want to lose along the way. Cornell lists low-impact activity — leash walks and swimming — as part of osteoarthritis management, and our guide to gentle exercise for a stiff dog covers how to do that without setting your dog back.

Weigh, then wait

Most vets will let you use the practice scales without an appointment. Once a month is plenty; weekly weighing on a bathroom scale mostly measures how still your dog stood. Progress on a sensible plan is slow and boring, and that is what makes it safe.

What lean actually buys you

Not a cure. An arthritic joint stays arthritic. What changes is how much work that joint has to do to get your dog off the floor in the morning, how far it can walk before the limp starts, and how much of its remaining strength goes on carrying weight rather than moving. Owners tend to notice it first on the stairs, and second in the willingness to get up and follow you into another room.

It also makes everything else on this site work better. A lean dog bottoms out a foam bed less, needs less of a lift from you, holds a ramp incline more easily, and is markedly easier to get into a car. If you are going to do one unglamorous thing for a slowing-down dog this year, do this one.