I have 10 mixed hens that are a cross between a road island red and a white breed im not sure of. Five are laying and the other five are younger hens and are not laying yet. I also have a rooster thats road island red and a plymouth rock rooster and I have some royal palm turkeys. They have been coughing and sneezing for the past few days and my female turkey has been sicker then the rest she has snot coming out of her nose. I bought some durmaycin-10 but when I was reading the directions it said not to use in egg laying hens. Im confused now because I dont know what to give them. What should I use?