I have 7 (I think) Roos, 3 of them crow 1 is the dominant Roo he crows and I've caught 2 others crow, the others don't. if there's one dominant roo does that mean that the others won't crow? Also, their combs aren't very developped like the roos that crow, they are all the same age give or take a few days. I should go take pics but anyway, the short of it is do roosters crow no matter what?