I don't know what is going on with my chicks. I have Buff Orpingtons, SL Wyandottes, and Light Brahmas. About 9 of each. They are now 3 weeks old. Yesterday the LB and the SLW were pecking all of the BOs! All but 2 ended up with a shortage of tail feathers and bloody rear ends. I went ahead and put a divider in the brooder, so all the BOs are separated from the rest of the flock. I also changed the lightbulb back to red. Also gave all the BOs a good dose of Blue Coat. They all have plenty of food and water, I increased their brooder size last weekend so it is now 4' x 8'. Are they going to outgrow this problem or will I need to keep them separated going forward? Thanks for your help!