UPDATE:
I found out it was the black silkie. Thank you all for your help. Iām glad to know that the other nonsilkies are pullets and not roosters.
Hello. I got 4 chickens from a hatchery 2 Americaunas, 1 Rhode Island Red, and 1 barred rock. These chickens are now 15 weeks old. I also purchased 2 silkies from a lady. At the time, the white chick was bigger than black chick and now the black one is bigger. She said they were the same age but Iām not sure about that. They are supposedly 16 weeks now. I have just recently noticed that one of my chickens is crowing and I just canāt figure out which one it can be. Also, last week, one of my americaunas (the lighter grey one) went over the fence and lost some of its feathers from the neighbors dog. Iām not sure if perhaps something like that can lead to crowing because Iām new to all of this so I would love some help from the experts if you donāt mind!