I own a barred plymouth rock chicken that is about 9 months old. All of my 12 hens and 2 roosters are free ranging in our 1 1/2 acre yard. They have water in and out of the coop that is changed regularly and food in the coop. Every once in a while, I give them some scratch. Recently, one of my hens is having trouble breathing. She has a very "rattling or raspy" breathing. When she breaths she lifts her head into the air and streches out her neck. Her comb is like maroon (no longer red).She also sneezes alot. (Well, I think it is sneezing. However, I'm not certain.)She was attacked by a dog earlier this year and has an occasional limp every now and then. Today, she is having trouble keeping up with the flock. No other chickens in the flock are showing any signs. There are no vets around where I live that will look at chickens. She is not doing well. I really want to help her but I don't know how. If you can think of anything to help her please let me know. Any idea will help me at this point. I will try to post pictures and videos but I don't know if it will work. Please help!