I noticed the other day that my Dominique, Lucy, has the sniffles. She sneezed a couple of times while I was holding her and she shot out some clear stuff on my hand. She also has some poop smudges on her fluffy butt feathers. I bought some tetracycline and have mixed it into their water for the past couple of days. Today, my only confirmed egg-layer has poop smudge on her butt and it looks like my one suspected egg-layer has some on her butt too. My other two are clean, so far. Should I be worried? Will this tetracycline stuff clear up a minor illness? Is there anything else that I should be doing for them? This has been a weird winter... Wet, below freezing some days and into the upper 40s other days. I don't know if that's the cause or if it has something to do with them just starting to lay. I'm really new to chickens, so I'm kind of at a loss.