I was in heaven when I bought what I thought was 3 female Mille Fleur D'uccle chicks. Now they are 7 weeks old and I wonder if I have two roosters. Can anyone give me some info? I've done a little research, and thought all chicken have combs, but one of mine does not yet have one, but the other two do. Also, when I let them out for exercise, the two chicks with combs will fly up and "play attack" just like I've seen on TV with "cock fights". If I have two roosters, are they going to try to kill each other later on?