OK, So yesterday I picked up two new chickens to add to my existing flock of 4. I stupidly put them together last night, and now this morning, I noticed one of the new one would just sit in a corner, close her eyes, and breathe heavily. I'm worried she may be sick. She also has a swollen eye lid, with what looks like crust. I have no idea if it's from being ill, or being pecked. She is also the one being attacked the most, she won't fight back either, she just screams and runs. I'm really stressing out now. OH, I also noticed she had a slightly unpleasant smell. What should I do? She's already been with the other hens since last night, and I'm afraid they are already infected. HELP! Should I call the lady I bought them from and see if she will take her back? Am I over-reacting?