Hello all. My name is Josh, and I have been raising chickens with my family for about a year and a half now. We currently have 3 egg laying birds that are about a year old. We also have 3 little ones (only one is egg laying) that are a few months old. The three little ones are frizzle chickens. Of the three bigger girls we have, one is a barred rock, one is I believe an australorp, and I am unsure of the other. They have a pretty decent coop setup (I'll grab some pics tomorrow). We try to let them all out to roam around the yard when we are home, they usually go back in the coop when it starts to get dark out. For about the past two weeks, we had let the little ones stay in with the big birds with no issues. I checked on them this morning, and one of the small frizzle had been attacked by the others. She had a pretty good wound on the back of her neck, so I sprayed her with antiseptic spray, and separated her. After this episode I had planned on moving the little ones back to a separate cage, away from the big ones. I still have the wounded separated from the other two, however it seems they are all fighting now. Once I moved the other little ones to their own cage, they started to peck at each other and screech. I'm at a loss of what to do, they have never really fought like this. Any ideas??