I added 4 two month old chickens to our flock back in late June, straight run. We were replacing a couple lost hens. About a week ago I noticed one trying to mount one of our hens but this one was smaller of the 4. This week one of the chickens we were quite sure was a rooster started crowing. This morning 3 of them started crowing but the crows were all different. The chicken we suspected as rooster has a solid strong crow. The other ones is not nearly as defined and one of them even sounds like a weak constipated crow. I have heard that hens can sometimes crow like a rooster so I want to make sure I am only getting rid of the extra roosters and not a hen. What would be best way to make selection? Going to be going out of town in a few days and would like to take care of the selection process so my wife does not have to deal with any fighting.