I don't know if I am being paranoid or what, but in the past week or so, Coopers belly skin has been sort of getting dark blotches on it. Also, I was rubbing his tummy today and noticed at the bottom of his penis there was two kind of marble-sized bumps on either side right at the base of it. He kind of wiggled a bit and they dissapeared??? He was neutered about a month ago. Any suggesions? He has been acting normal. The only other thing I can think of, is when he pees it comes out in spurts kind of - not just one steady stream? (I am not sure if this is normal or not).