I've had Zero out of 25 hatch and I've had 6 out of 6 hatch. My average success with shipped eggs overall has been about 50%. And of that most have been roosters. I don't know if it is because the rooster eggs are stronger or if it's just the people sending them have mostly hens that produce roosters. I've now gone to hatching my own eggs but I plan to get more shipped eggs later this year hopefully for some breeds I want and don't yet have.