I have roosters born and raised together, and they fight. They've either had to be rehomed or seperated. The hens will start laying at around 16 ~ 22 weeks of age. Now the males will mate with them, but you can still eat the eggs. The only difference in a fresh fertil egg and a non fretil egg is a couple of cells you won't be able to see. We eat our eggs. If you hatch out eggs, you usually end up with half roo's and half pullets. Also, don't be surprised if some of the chickens roost in the rafters of the coop rather than the roosts you provide. Chickens love to roost as high as possible, it's a natural instinct they have to guard against predators. I have roosts, but my chickens that are higher up in the pecking order always roost on the rafter. Good Luck!
pullets is hens that ain't laying...like a heifer is cow that ain't calved
well some still call young young hens pullets like when they are first figuring out that whole laying thing...someone will get on here and say it happens at a specific week...