My dog Dixie is a female Pitbull-Boxer mix. She's about 11 months old. Today, I was with her when I noticed she was missing a LOT of fur on her shoulders. :yikes: Then we found out it was my male Pitbull-hound mix, Blue. He's fixed, but they still mate regardless. The chewing happens during mating. Why does he do this? Is there a specific reason? Is it dominance or should we be worried? For now my mom is separating them at night, putting them in separate crates.