Kip, who is a very shiny bi-black, has some brown fur behind both ears, his 'armpits', and some on his belly. Everywhere else his coat is super glossy black + white. Does this sound normal? I don't think the brown is dirt - he just had a bath yesterday and is squeaky clean. I've never had a black dog before, so I'm kind of puzzled by the brown fur. His coat and skin seems quite healthy. By the way, Kip is now 6.5 months old and weighs 20 lbs!