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Feeding the Older Dog — Adjusting the Diet with Age

20 July 2026 · 2 min read

As a dog gets older, the body changes — metabolism, activity, teeth and sometimes appetite. Diet can help the older dog stay well for longer, but it takes looking at this particular dog rather than switching to "senior food" by default. There is, after all, no single template that fits every older dog.

Age is individual

When a dog is considered a "senior" varies with size — small breeds age later, large breeds earlier. And two dogs of the same age can have entirely different needs: one has lost muscle and needs help keeping weight on, the other has become sedentary and round. That's why assessing body condition and keeping an eye on weight matters even more with age.

What often changes

Weight in both directions

  • Overweight becomes more common when activity drops but the portion stays the same — adjust the amount to the new, calmer everyday routine.
  • Weight loss and muscle wasting also occur in older dogs. Here it's the opposite: making sure the dog gets enough, and not skimping on protein.

Muscle and protein

Older dogs need enough good-quality protein to preserve muscle mass. Needlessly cutting protein in a healthy senior is rarely the right approach — muscle is important for mobility and strength.

Joints

Stiffness and joint problems are common. Keeping your dog at a healthy weight is one of the most effective things you can do for its joints. Omega-3 and joint supplements may have a place, preferably in consultation with a vet.

Teeth and appetite

Dental problems can make a dog eat less or reluctant to chew hard food. Soaked or wetter food can make things easier — but behind an older dog's dental trouble there is often something that needs to be looked at by a vet.

Is "senior food" needed?

Sometimes — but not always. Many older, healthy dogs do perfectly well on a good adult food with an adjusted amount. A senior food can suit if it matches the dog's actual needs (e.g. lower energy, joint support), but don't switch just because the bag says "senior." Start from the dog, not the label.

The most important thing with age: closer monitoring

Many age-related illnesses — of the kidneys, heart, joints and more — affect both appetite and the right food choice, and they require veterinary assessment. A senior food is no substitute for investigating a problem. Regular health checks become more important the older your dog gets, so that changes are caught early.

When to contact your vet

A changed appetite, weight loss, increased thirst, stiffness or sluggishness in an older dog should be taken seriously and checked with a vet — these can be early signs of treatable conditions, not "just old age."

NutriDog helps you adapt diet and routines for your healthy senior dog based on its individual needs — and is clear about when age-related changes belong with a vet.

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