My chicken is sick! I went out this morning and I noticed that the left side of her face was very swollen. I put her in isolation , but had to get to work and I didn't ace time to really check her out. I just got home and it's way worse than I thought. The left half of her face is swollen, her right eye is a little runny, and she has a brownish gunk in her mouth. I don't k ow what to do, please help me help her.