I have 2 laying hens, 5 three month old hens and 5 three month old roos. I only want to keep one roo and have already picked him out. How often is a roo infertile? It would really suck to send the other 4 roos to freezer camp and then find out that the one I picked out is infertile. Should I keep two roos until I can verify the fertility of my favorite? Another question while I'm at it: Do roos ever become temporarily sterile due to heat like rabbits? Just curious, as my rabbit buck was sterile for a month or two this summer.