I'm currently raising two 3-week old barnevelder chicks and two 2-week old ameraucana chicks. They get along fine, they're all eating a healthy amount and everything. Yesterday I noticed one of my ameraucanas had wet poop stuck to her butt, so I got a paper towel to clean her off and didn't think about it too much. Today when I checked on my chicks (24 hours later, I didn't notice when I checked them in the morning), she had a huge ball of dark, dried droppings caked onto her vent (about the size of the top of your thumb). I soaked her behind in warm water to loosen it and tried removing it, but only about half of it came off. Any idea what's wrong?? I'm very worried.