I enjoy reading the posts on this forum, but this is my first post. I am afraid for my chickens. Overview of what has happened this week. Monday- noticed 9 wk old gold-laced polish top-hat chick looked kind of "hunched over". Also noticed a 1 yr old RR hen had swollen, enlarged eyes. Tuesday a.m.- the 9 wk old top-hat was found dead in the coop. No external, noticeable signs of illness. Tuesday p.m.- noticed a 6 wk old RR chick was sleepy, not active, not reacting to stimuli. Tried to give it feed and water, but it was not interested. Wanted to stand in one place and sleep. Would wake briefly when picked up, but eyes would quickly close again. Some trouble keeping balance & would occassionally fall over. Was dead by 9:00 p.m. Didn't notice any other external signs of illness. Wednesday- our favorite hen, a 1 yr old gold laced polish top-hat named Elvis, remained in the coop, sleeping on the roost, when we turned chickens out to free range. Highly unusual as she is usually one of the first ones out the door! She stayed on roost most of the day, sleeping. Her feathers are ruffled up, like she is cold. While examining her, I noticed a bit of stringy white material along edge of beak. When I pulled it, her beak came open and I noticed what appeared to be excess clear, slimey mucus in mouth (stretching from top to bottom of beak). Observed her drinking, but not eating. She roosted on the ground tonight, and usually is up on the roost. Also, she is normally VERY vocal. Today she has been silent. I'm very worried about her. Also noticed tonight that a Delaware rooster has an eye that is swollen & a little runny. The 2 chicks that died and Elvis (now sick) are housed in the same coop, but different sections. My coop is divided into 2 sections. I have a 1 yr old mixed flock on one side (this is where Elvis lives). I have raised these from day olds. On the other side I have 4 bantam cochins that were bought & added to flock 2.5 weeks ago, as well as 2 top-hat chicks that are 9 wks old ( 1 of these died, as mentioned earlier). Then inside this side of the coop, I have a large brooder cage, where my 6 week old chicks live (including the one who died). My 1 yr old flock (Elvis) free ranges for a couple of hours each day. The other chicks stay inside the coop exclusively right now. The 1 yr olds eat laying feed, plus what they get when free ranging. The others all eat starter feed (medicated). After the first chick died, we completely cleaned out the coop, removing all hay (bedding) and litter, and replacing with fresh, deep hay. My chickens have never had any other mediction/wormer/vaccinations. We've never had any problem with illness before. I hope someone can give me some insight into what might be going on and how to best treat it. Thank you so much! Lisa *UPDATE!!!* After reading the responses (and links) posted below and consulting with a friend, I decided to treat this hen and the rest of my flock with Sulmet, which is supposed to treat the following diseases in chickens: -Infectious Coryza (Avibacterium paragallinarum) -Coccidiosis (Eimeria tenella, Eimeria necatrix) -Acute Fowl Cholera (Pasteurella multocida) -Pullorum Disease (Salmonella Pullorum) I bought a bottle at a local feed store for less than $10. Sulmet is added to the chickens water. The hen mentioned above did nothing but lie face down & sleep all day and night. We woke her every few hours and dipped her beak in the Sulmet treated water. About mid-day today, she woke up and we found her sitting on top of the plastic tub she had been sleeping in! She is almost back to normal!