I have another idea I'm interested in Maybe raising four different varieties of Plymouth Rocks: White, Barred, Buff, and Partridge. I would have four different pens for them, separated by color. How many hens would be advisable? I'm thinking about two or three roosters for each variety. I don't have a lot of space, I would like to keep my breeding program small scale, but I want enough hens to make keeping the roosters economical/worth it. (Roosters will have to be housed separate from each other? Or they can live together?) And I'm a little iffy on the whole hen breeding thing. You expose them to a rooster, and they lay fertilized eggs. How many fertilized eggs can you expect to get from a hen exposed to a rooster every day? So if I have maybe 4 hens of each variety (out of maybe 10 or 15? I might have) producing eggs for me, how many fertilized eggs can I expect to be able to put in the incubator in one go? (I am willing to have enough incubators to hatch out all eggs at once.) And hatch rates...I can expect maybe 80%? 90%? Less? More? Oh and what age should you expose a hen to a rooster? They start laying eggs at 17-20 wks, but should they be fertilized then? Or should they be older? ALSO -- do you know if crossing any of the PR varieties gives you different colors or the same colors? Thanks in advance.