We have a five month old columbian wyandotte, Lacy that chases, and beats up cats. She (or he) is not the dominant bird, that would be Pepper, our barred rock. Lacy hasn't laid an egg or crowed yet and I was wondering if given the circumstances this might be a hen or rooster. The cats aren't lazy either and have attacked Pepper and chased our banty hen across the yard. Since Lacy has put them in place they haven't come back much. Another thing she does is fly up on chairs and other objects. I will try to get a picture on tomorrow.