Yesterday I noticed that my Black Copper Maran chick has a swollen vent. She is two weeks old. There is no pasting up, but the rump is wet and swollen. I ran her butt under warm water today to clean and soothe the area. She seems distressed, but she is eating and drinking. I saw her poop and it was normal. Is there anything else I can do for her, and what is causing her vent to be so swollen?