My 6-9 week old RB turkey poults have started fighting with each other occassionally. They try to bite each others necks and sometimes pin each other to the ground. This morning, two were taking turns sitting on each other's heads! Once blood was drawn. I want them to survive until Thanksgiving, and am worried that they're going to hurt each other seriously. I have 20 that currently free-range or live in large pens, and I can't possibly build separate pens for each and every one. Even the free-range ones are fighting. Are they just play-fighting? How do I prevent this? Or should I just not worry about it? Help!