I have 4 hens 2 red sex links they are over a year old and 2 road island red that are a year. 3 of the hens have been laying on eggs but I had to remove them they were killing the babies! Since I removed the eggs I have one chicken that is fighting the others. I cant figure out which one. I've seen 1 of the chickens going after 2 of the other ones one time and didnt think nothing of it just broke it up and moved on although that was the first time I seen them even try to fight since then I'm finding fathers all over the place thought something got ahold of one of the chickens it was so bad. And this morning I left them out and 1 of the hens tailfathers are almost gone cause of fighting. I dont know what to do or what has caused this aggression the eggs have been removed 2 weeks ago