I received 3 baby chicks last week. I've been checking them everyday to make sure they're not pasting up. The BPR had a little bit of dried poo on her but it was far from her vent. I couldn't get it off so I left it thinking it would drop off. Last night when I checked her again it was still there, and she was pasted up. So, I got a Q-tip and softened it with warm water until it came off. The bigger piece further down started to loosen up. So, I got it to come off and this is what was there: any idea what this is and what caused it? Thanks