Dog filter: What are the dark patches on puppies' bellies?
July 10, 2016 11:19 AM Subscribe
I've noticed that all of my dogs (and most puppies in general) have had some irregular, dark splotches on their bellies and underarms (underlegs?) that fade with age. Kind of like liver spots on older humans, but larger and darker, and generally much lighter by about one year of age. What are these called, and can they be used to estimate a dog's age? Curious because I've noticed them on all of the dogs I've ever had, but nothing turns up on google, except for pathological conditions.