Aggressive Blue Pitbull
Today, I got a blue pitbull, he's 7 months old. & I have a blue pitbull, she's 6 months old. But the male shows her teeth a lot when they play. Also, when i see it's getting rough, I get him by the collar & push her to me. She's tried to bite me the times I've done that. She also grabs things that fits on her mouth and won't let go. Help?