So...the temperature is going to be in the 100s this week. Anything above 95*F severely reduces the fertility in a rooster since he cannot cool his testes outside of his body. When the temperature gets too hot outside...the sperm "cooks". So...question is...should I bother incubating the eggs? It takes approximately 7 days for the rooster to regain his normal sperm production...barring any more high degree temperatures. I've stopped selling the hatching eggs right now as I know fertility won't be, what I consider high enough for a good hatch.