By breed & age
When is a dog considered senior? Age by size and breed
When is a dog considered senior? See age ranges by size and breed (AVMA, AAHA), why big dogs age sooner, and what to do next.
Topic
Senior dog by breed & age
What to expect as your dog ages, and when different sizes and breeds count as senior.
Not veterinary advice
This site is for general information and isn't a substitute for professional veterinary advice. Always talk with your veterinarian before changing your dog's diet, supplements or medications, or if you notice new symptoms.