My Isa Brown 'hen' is crowing... a LOT. How can I tell if she is really a he, as this behavior is not very useful in keeping our clandestine chickens, well, clandestine. The males were white, and we traded them for hens, so I thought we were all set. Then four of the five brown 'hens' got bigger than the fifth one and all started acting rather rooster-like and aggressive. So much so that we had to eliminate three of them. Now the other larger brown 'hen' is crowing very well and frequently. We are not allowed chickens here, so this is not good, along with being annoying. Is there a chance that this hen is a roo and not really an Isa Brown? I was told the dominant hen can start doing a rather sorry 'crow', but this crow sounds real.