I have 3 roos that are 4 1/2 months and a roo that is 3 1/2 months. This morning I found blood drops everywhere and looked everyone over to find the 3 1/2 mth roo with blood on his face and blood dripping from his wattle, the vein that runs down it was were the injury was and when he shook his head blood would fly all over his head. They all have had their little fights before but nothing like this, I'm not whis roo did it but I dont want it to happen again.. I know my hens that are 4 1/2 months are getting ready to go into laying so could the older roos be more aggressive because of that?