Well this morning I lost 2 chicks. They were fine and then within 2 hours they were gone. I have a 3rd I’m holding and giving duramycin with an eye drppoer. The only symptom I can see is yellow kind of mucous poop right when they get sick. I’ve put duramycin in the drinking water for the rest of them. They are all clean and warm and have been eating medicated feed since hatching. Any advice would be appreciated.