Don't feel bad, I took Chuck in for a "well child checkup" and mentioned to his vet a growth on his belly that I was really worried about. It took us a minute or so to find it because he is so furry. When we found the spot, his vet started just cracking up. He said, "That's not a growth, it's his nipple!" I was so embarrased! The vet still teases me about that one.