Hi, I'd like to incubate my first round of chicks so they would hatch around Christmas. I have 2 RIR cockerels. They are about 6 months old and mate the pullets regularly, but don't always connect. I just started checking, but haven't identified fertile eggs yet. I also have an Olive Egger cockerel who is about 5 months old. He just started crowing and mating about a month ago.The other boys sometimes run him off when he tries to mate. Any suggestions on how to increase fertility? I've seen breeding pens, and I'm wondering if that's the way to go. My chickens stay in my fenced in backyard and I have three different coops,so I could put together a temporary breeding pen. I am open to any of the males fertilizing the eggs, but the OE would be my preferred chicken daddy. Thanks for your suggestions.