Senior Dog Nutrition: Feeding an Older Dog
Vet-reviewed via PetHealth+ · Last reviewed June 2026
Senior dogs often need fewer calories but high-quality protein to maintain muscle. Joint-support nutrients, smaller kibble, and softer textures help ageing mouths.
When is a dog a senior?
Varies by size — giant breeds age faster than small breeds.
Kidney and liver
Some seniors need modified phosphorus or protein — blood tests guide diet choice.
Appetite changes
Dental pain, nausea, or cognitive decline can reduce eating — investigate with your vet.
Related: Senior dog care
Frequently asked questions
Should senior dogs eat less protein?
Healthy seniors often benefit from adequate protein; kidney disease may require restriction.
Are senior dog foods necessary?
They can help with joint support and calories but are not mandatory for every dog.
My old dog is losing weight — why?
Dental disease, cancer, kidney disease, and hyperthyroidism (rare in dogs) are possibilities — vet check needed.
Can I add supplements?
Only with veterinary advice — some interact with medications.