This RIR pullet is 14 weeks old. Bought from a feed store that ordered them from Ideal. The other 9 pullets are fine. The rest of the flock (10 hens, 1 rooster) are fine. We removed her from the rest of flock immediately. She is otherwise very healthy. Eating and drinking with no problems. She made it very clear to me this morning by clucking and running back and forth that she did not want to be alone in her kennel. I put a couple drops of opthalmalic solution in her eyes and I will clean it out today with sterile water. What else can I do? Should I vaccinate everyone? Should I start her and/or everyone else on antibiotics? Last week I had one 18 week old pullet (bought from two different places, no relation) die for no apparent reason. She was fine one day, but the next day she became real weak and would not stand. We removed her from the rest of the flock and gave her some sugar water with a syringe, but she was dead the next morning. No watery eyes or wheezing. Is this just a coincidence or should I be worried that my flock is gonna start dying off one by one because of some kind of virus? Also, it has been very humid, wet, and rainy the last week. The chicken run has been very wet and muddy, but has dried out alot, therefore, the babies and big girls have been loving their dust baths again. Can the weather or them getting wet cause the chickens to have respiratory problems or other any other problems? Any help and suggestions are greatly appreciated. Thanks.