I'm in complete agreement.Yeah, I'm thrown, too. Pullet crowing is not so common as one would believe from reading these forums, so I'm inclined to think it is a very late developing cockerel. But the feathering shows no signs of that, and if 5 months is right, then that adds to the confusion, because it should be showing male feathering by then.
Will be very interesting to see the outcome!
~Alex