Yesterday we noticed one of our RI Red hens was looking sick. She is standing, keeps her head and beak up, with her beak mostly open. No noticeable noises, but seems to be having quiet gasping of air. There is no runny discharge, no cough or rattle. She is lethargic and has had very minimal food and water intake. Her wt seems unchanged and she did not lay any eggs in the last 36 hrs. Her droppings seem fine with no visible blood/worms, though maybe a little bit more white material than normal. Her comb and eyes look good. It has been cold/rainy lately but the chickens have a protected coop and large free range area during the day. We have isolated her from the flock on the porch, and so far all other chickens seem healthy (touch wood!) and we moved them to another coop to be on the safe side. We have had no recent additions to the flock of 19. I've tried to research through the different postings and links, but none of the symptoms seems to quite match up. We would spend money on medications, though likely not take her to the vet unless other chickens in the flock get sick. We don't want her to suffer if this isn't an illness that she would likely recover from. If anyone has any ideas of what the illness could be, or inexpensive treatments recommended, that would be appreciated. Thanks.