Senior Diet
Feeding approach for older dogs and cats that adapts calories, protein, and texture to age-related changes like muscle loss, dental issues, and organ function.
Also known as Senior Pet Nutrition, Senior Dog Food, Senior Cat Food, Geriatric Pet Diet, Aging Pet Nutrition
Getting older changes how a dog or cat's body handles food, and that's really what "senior diet" is about. It's not a single product with a fixed formula, but an approach to feeding that adapts to the physical changes that come with age. Dogs are generally thought of as seniors from around 5 to 8 years old depending on their size, with larger breeds ageing faster and sometimes reaching senior status by 5 or 6, while cats are usually considered senior from around 10 years old.
A few things shift as pets age. Metabolism tends to slow and activity drops, so many pets need somewhat fewer calories to avoid piling on weight, though this isn't universal. Maintenance energy requirements generally decrease over a dog's lifetime, while in cats they tend to decrease up to around age 10 and then start to rise again, so the picture is genuinely more variable in cats than in dogs. At the same time, older pets often lose lean muscle mass through a process vets call sarcopenia, and up to a third of that muscle can be lost in cats between 10 and 15 years of age, which means senior pets, especially cats, may actually need more protein rather than less to help slow that decline. This is a useful thing to know because there's a persistent myth that older pets should be switched to low protein food. In healthy seniors without kidney disease, that's usually the opposite of what's needed.
Weight isn't the only thing to watch. Ageing can bring on dental problems, arthritis, reduced thirst, weaker immunity, and in cats specifically a higher risk of kidney disease, hyperthyroidism, and osteoarthritis. Senior pets may experience weight change, decreased mobility, arthritis and joint pain, and dogs in particular are more prone to dental disease with tooth and gum sensitivity. Because of this, food texture matters too. Some older pets do better on softer or wet food if chewing has become uncomfortable, and wet food has the added benefit of boosting water intake, which matters since ageing can blunt a pet's sense of thirst just as some chronic conditions common in older pets increase their water needs.
None of this means every senior pet needs a special "senior formula" bag off the shelf. What matters more is regular monitoring, body condition checks, and adjusting food type, portion, and nutrient balance to whatever is actually going on with that individual pet, whether that's mild weight gain, muscle loss, kidney changes, or joint pain. Dietary changes can help manage chronic conditions like kidney disease or arthritis, but it's worth talking with a vet before switching diets to make sure the new food actually matches your pet's changing needs. A vet can also help track subtle warning signs worth flagging early, including:
- Noticeable weight loss or gain over a few months
- Reduced appetite or new fussiness around food
- Increased thirst or urination
- Stiffness, reluctance to jump or climb stairs
- Dull coat or reduced grooming (especially in cats)
- Bad breath or visible dental discomfort
Catching these early and adjusting the diet accordingly, ideally alongside your vet, is usually far more effective than waiting for a problem to become obvious.