I have 34 hens. I got four packing peanuts 10 weeks ago which are turning into RIR roosters. I wasn't going to keep any roosters but now that I have them I figure what they heck I will give roosters a try and maybe I will end up with some free baby chicks down the road. So how many of my roosters should I keep, assuming I stay at approximately 34 hens? Thanks in advance.