Hello. When taking care of the chickens yesterday, i noticed one chicken sort of sitting off on her own, normally a skittish bird, she was not yesterday, and sat with eyes closed. Today, upon checking on the birds, the quiet chicken yesterday was acting normal again. However she and two others are making noises that sound like coughing and sneezing. There is no discharge, droppings are normal, food and water consumption in the flock is normal, and the birds are acting totally normal, they're just making odd noises. (similar to what a child would sound like if he/she had a cold and sort of had a barky cough) Short of taking them to the vet, any suggestions?