I have 5, five week old chicks in the same cage. Three partridge rock, and two old english game chickens. We have no clue what their gender is. Well, today the two old english game chickens (that came from the same chicken = brothers/sisters) started fighting today. One of them attacked and then the other one started defending itself. One of them ended up with a bitten comb and a bloody ear. Any reason for this?? This horrible fighting just started today.