My baby chicks (turkeys and chickens) are peaking each others butts and making them bleed BAD please help!

Is a certain one? My male chickens did this to the females.

Chickens will peck for a number of reasons. They can be: too hot, too crowded, not enough fresh air or short of feeder or waterer space, or to establish the "leader" of the flock. To stop it, try fresh grass clippings, weeds, and lettuce in the pen. In cold weather, fresh hay works. Darken the hen house. Use milk blocks. As a last resort you can debeak, cutting 1/3rd of the top bill & just the tip of the bottom bill by using the Debeaker/Trimmer Other products offered to help prevent this problem are: Poly Peepers (like blinders), antipick lotions or spray