We are being given some chickens. They are all about 5 years old. The hens (non-laying) will go in the stewpot, but I'm told that the RIR rooster is a real sweetheart. We have a Silver Phoenix roo right now who is decidedly NOT a sweetheart, and would like to maybe keep the RIR and get rid of the Phoenix. I don't want "Mr Darcy's" genetics when we start to breed. (Yes, we named him Mr Darcy. He's beautiful and gentlemanly to look at, but definitely has an attitude problem. ) So, my question is, would the 5 year old rooster still be able to service our girls enough that we'd get dependably fertile eggs or has he passed his prime too much?