This may have been answered before... one of our hens seems to have a bit of a head cold. She's got a snotty nose, sneezing, and she coughs sometimes, sounds like she's got mucus in her throat as well, breathing from her mouth and making a... wet growl, I would say, when she breathes. I want to pick up an anti-biotic for her but for the life of me I can't remember the name of the one I've read to use. I think it is one typically given to cattle and put in the water. Please help!