This summer, my little japanese cockerel was at 100% fertility! But this fall, he hasn't been paying as much attention to his two favorite hens. My last attempted hatch of 10 or so eggs were NILL. I do throw about a cup of scratch out daily to all 20 birds, and feed them layer ration, and no one appears sick. I do have a bunch of younger cockerels who are just now starting to come of age, and I wonder if my little japanese boy is too busy 'being boss' and strutting his stuff to fertilize the eggs. I managed to rehome one cockerel, but still have two more to rehome to even the numbers up a bit. They have plenty of yard and coop space. I did use both Wazine, and then pour on Ivermectin 2 months ago to worm and delouse them. I was just wondering if the ratio was the problem or if I unknowingly sterilized my chickens..... I've read on here that Wazine leads to horrible hatches, and I was wondering how long I can expect that to last.