One of my Silver Sebright hens who still sleeps in my mother's house is a crower. She seems to do this if she becomes irritated or impatient. When she was younger and we were still unsure what sex she was (hence the name Willie), "it" crowed & we were disappointed since we didn't really need another rooster. But that egg she laid the first time cinched the fact that she is indeed a hen. And we have another little hen we were afraid was a rooster, a cochin that also crowed. But I witnessed that egg coming from her! Any idea why a hen would crow?