My RR starting acting really strange yesterday afternoon, When i came home from work i went to let all of my chickens out of their coop like i normally do everyday, and she stayed behind. So i sat around and watched her for awhile, She is walking really slowly and not hanging out with the rest of the flock. I put out a treat of cottage cheese for them and she ate that, and i saw her drink water so that part is good. But then this morning when i went out to feed she was hanging out by herself again, i saw her drink water, but she did not eat. She pooped.. but it wasn't very much and it was really runny.... I am not sure what is going on, All of my other girls are fine and my Roo, so it is very odd and makes me worried. They are about 2 years old. I got them when they were about 1 year old.