So we purchased 11 black australorp chicks. By week 4, four of them were definitely roosters. I've own this breed before and they're were very sweet and good too each other. Unfortunately there was one bad one in the bunch, a roo that would attack the other chicks. I didn't witness it until they were about 5 weeks old and thought maybe this bunch was just really energetic. Then this roo started to bite us also. After it was culled for safety purposes, the chicks are still very unkind with each other. Jumping on each other and not nearly as sweet as my other australorp hens. Is there any way to fix their bad behaviour?