I have a silver Sebright that crows when she’s stressed. And she’s almost 7 months old. Already a good mom.For a change I'm going to differ with everyone else. Although they are hen feathered, Sebright cockerels generally have a different conformation than that bird. I'd hang on to this bird for a bit longer until I was absolutely positive that it was a cockerel. I do agree that it is very rare for a pullet to crow - generally it is an aged hen that does so, but my gut says pullet on this one.