So I noticed today Angus as some black spots on the underside of his neck/throat... any ideas what it could be? Is it a bad thing? Or is it normal and I just never noticed it. It just looks splotchy. His temps are good, he is eating well, still super friendly, and has lots of energy. Here's a pic. Sorry its not a great one but its the only one he's not trying to eat my iphone in lol.