What the heck is with all these people thinking that they know your dog's breed better than you? I get a lot of people who ask if mine are yorkies, but I think they're just doing that cause they are obviously a terrier, but if you don't know yorkies, you may not know...i guess. For someone to come out and say "no, your dog isn't this, it's this" is just rude! I'm sorry that someone would do something like that. Yours looked quite a bit like my Tank, though Tank is darker, but I have seen quite a few the exact same color as yours. Good luck to you
