They probably would have been fine to put them together a few months ago. I usually introduce the new chickens at about 18 weeks old or when the younger ones are close to the same sizeas the older ones. If you are putting all the roosters together in the same pen earlier would have been better since the younger ones wouldn't challenge the older one as much. I would integrate soon and watch all those roosters, 3 roosters to 9 hens is a possibly a bit much
Okay thank you for your advice!
