Hi! I just got a puppy about a year ago. Well not really a puppy anymore. Anyways few months ago when I was playing with him I noticed his balls had little black speckles. I didn't think much of it. But just before, I noticed alot of it has actually turned into dark splotches on his balls. It's not rough or anything, it feels like any other part of his skin. I was just wondering if this is normal? He's very playful and acts very normal. Should I be worried?