I have a friend who wants to get two cockatiels and two chickens as pets. She has a HUGE cage. It is about 6' wide 6' high and 4' deep. She said she is thinking of having the birds share a cage. I think chickens are a little dirty to have indoors, but she does not. Can she do this?? It never occurred to me, but I would think they would fight for dominance..... Wouldn't they??