we have three black australorps and we think we have two hens and one rooster but all the pictures we have looked at show roosters with bigger tail feathers. we have one that has very short tail feathers and two that have longer tail feathers but not quite rooster length. they are about six months old. we get two to three eggs a day and usually two in one hen box. there are four boxes, is it common for two hens to lay in the same box? also, we have witnessed one of the chickens trying to mate with another hence the reason for believing that we have one rooster.