Hello,BYC! We have a weird problem. We have few enclosures for chicken. One of them is all secured room. We had some chicken in and they all got sick,and some died. We took everyone out of there and we sprayed the room with Desinfectant. Few weeks later we put there our new hatch and they are also starting to get sick. We already lost 2 and more are gasping and sneezing. We treated with Oxytetracyclin, but it doesn't help. They have the water source with the nibs so there can't really be cross contamination. What can we do? I don't want to loose more chicks.