Purchased Pullets: Now Unsure

[JedJackson]

The black and white one could well be a cockerel. I don't think they are quite 3 months old, either. You may have heard someone else crowing, but I would keep my eye on it for a while to be sure.

 

[RoostersAreAwesome]

Hey y'all!
I purchased 3 chicks from the pullet bin. They are 3 months old. I swear I heard one trying to crow the other morning. What are y'alls opinions? I'm attached to them, and not allowed roos...View attachment 2899252

Updated pictures? The silver chick appears to be a cockerel.