I have 11 chicks born on Halloween +/- 1 day, so they are 8 weeks old now. Most appear to be Rhode Island Reds. I have 1 suspected rooster, because his comb and wattles developed pretty early on and are turning red. I have 2 more with bigger combs than the others, but my neighbor seems to think we have NO roosters. When will I know for sure if any of these are roosters? When do they start crowing? We've never had chickens from chicks before - just hens given to us. Thanks for your help! I love reading the posts because I'm learning a lot!