I received my chicks Tuesday, and everyone has been fine, eating, drinking, playing. However, this morning one wasn't acting right; and when I picked her up, her butt was really red and swollen. There wasn't any poop on her, though. I have out a partition between her and the others. I gave her some plain yogurt, and she has water with probiotic and antibiotic in it. She starts chirping like she's in pain; and so far, she popped, but it was somewhat firm. There is a watery liquid coming out also. Any help would be greatly appreciated!