We are new to chickens - picked up 7 about 3 months ago - 4 hens, 2 pullets and 1 roo. I noticed one of our hens was sneezing a little about 2 months, but seemed fine. Then our rooster about 2 weeks later suddenly became sick! Despite the fact that we gave him injectable tylan, he died 3 days later. Very sad. All seemed fine for about a week or two and suddenly our hens started to sneeze and one became quite ill like our roo. I had already purchased soluble and put it in their water immediately. All healed and all seems ok! However, I am so anxious that they will become ill again. (I am being a nut and keep listening for sneezes.) I am hoping we killed off whatever virus they had, but I just don't know how this works with chickens. Question - is there anything we should do to improve/maintain the health of our little crew? On top of that, long story, we took in a peachick who is sitting on my shoulder as I type. S/he is about 2 weeks now --- and I hope that whatever illness the crew had doesn't spread to the peachick when it's time to introduce her to the group. Any advice for keeping everyone healthy? I'm like a first-time mom! Thanks!