A small dog is considered a senior when it hits about 11 years old, a medium-sized dog at 10, and a large dog around eight.
Is 13 years old old for a dog?
A 13- to 15-year-old dog, depending on her size and health, is roughly equivalent to a 70- to 115-year-old person. In her elder years, it is harder for your dog to learn new things. In fact, she likely will be resistant to changes in her surroundings and routine.
How old is a 13 year old big dog?
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