[horsnaround]

I wouldn't take the chance of what could happen. I would separate them and not let them play together at all. Even with the 17 pound yorkie. Why take the chance of the pit hurting or accidentally killing one of the yorkies. I would just keep them separate if you want to keep them all. Not picking on the pit at all. Just big dog little dogs should not ruff play. Little dogs don't have a chance and they think they do they usually will not back down