Just for grins and giggles I put an egg from our chickens in the bator with the guinea eggs I set. I did not know if our roosters were getting the job done, it just didn't seem to take enough time.... I guess they don't need much stimulation. Well, this little egg was then placed under a boody hen who disowned it. It had been out of the bator for several hours and I thought it was a goner. But, I put it back in anyway. So, this morning while my daughter and I were in the kitchen- we here chirping. I thought the guineas were way early -not due until Tuesday. Savannah looked in and said "It's the chicken egg" Sure enough, it had a pip. Now the little lady is taking her time, but she is still working on the egg shell. Guess the roosters know what they are doing!