My chicks are 3weeks old. I have 6 Polish tophats, they just starting fighting today, a little blood from the main two. What do I do? They have been fine until just now. I put a fence around their box yesterday so they would stop pooping on my floor. Also what age is reccomended for outside? Im in Minnesota so nights are high 40's and days are 60's now. Mainly tho, how do I get the two to stop fighting?