We have 12 layers and 12 meat birds. They are 4 days old. They are seperated in two enclosures. They start leaning their head back and fall over and flail and if you stand them up they fall right over. We then seperated those effected from the rest on a heat pad and they get weak and then have a seizure and die within a minute. We started with the medicated water additive when we got then they didn't seem be drinking it much so we switched to water with Apple cider vinegar. We put oregano and cinnamon on there feed. we then mixed up some feed with milk and yogurt which brought some of them around but we've still be losing them. So far today we've lost 7 of 24.