They probably are chalking it up to a pigment change. Never hurts to do labs. If it looks healthy otherwise, I'd be inclined to trust the vet (as long as they can tell you what it is). My girl has developed dark speckles on the bottom of her tummy and around her girly parts. Pigment for her and no problem..
__________________ Crystal  , Ellie May (RIP)  , Rylee Finnegan  , and Gracie Boo🐶 |