I have chickens kept at two separate locations and started getting sick - shaking head, bubbles in eyes and lethargic- treated with tylan 50 about a couple weeks ago and seem to be getting better but I'm not there everyday. here at home I have six-week old chicks and now they are getting sick- mucus from nostrils and in mouth, raspy breathing and shaking head. I don't know what it is but I did notice that from the first group ALL the roosters were sick and worse than the hens and here the sickest one I'm pretty sure is a cockerel. So wanted to ask if anyone has ever had experience like this, just seems odd that the males are worse off and maybe it's a tell tell of a certain disease or maybe males are just more prone to illness overall. Any info would be great. Thanks.