Ok, I'm having a problem. I got my breeding trio, and hatched out a small batch of chicks. Both roosters from that hatch seem to be infertile. They tread the hens, but I've never gotten a single fertile egg from any hens they've been with. From the hatch last year, I got 2 more cockerels. They're approaching the 1 year mark now. Again, I'm not seeing fertility in the eggs. Yes, I know what fertile eggs look like. My original rooster has produced many with his hens, and I've hatched some out, but he's several years old now. The first group was raised on medicated chick starter, which is all you can get where I live, then put on gamebird/showbird feed which is about 30% protein. I know it affects the hens laying abilities, so I cut back to Purina Flockraiser. Later on, I put them on Mana Pro Layer feed, but give them occasional mealworms, and cat food. I up their protein levels when they molt to around 24% which helps them feather out, and I still get some eggs. Potency with my original rooster has NEVER been a problem. I went more conventional with the second group. I fed them medicated chick starter, later Purina Flockraiser, then about a month ago, changed them to layer feed. I changed out roosters on a couple groups, about 3 weeks ago, and I'm still not seeing any fertile eggs. Yes, the original rooster, and his hens are giving fertile eggs, but none of the offspring males seem to be fertile.