An enormous pup may age much more slowly and gradually at the outset, but be nearing middle age at 5. Tiny and toy breeds You should not develop into "seniors" right up until about age 10. Medium-sizing pooches are somewhere in the center on the two counts. “My guess is https://elliotwdkpu.blogofchange.com/34331627/getting-my-dog-lifespan-estimator-to-work