I've recently adopted 2 ducklings, and they are about 2 weeks old now. One is always jumping around, happy and healthy. But the other has always been timid and didn't really like to be touched. But recently, I've noticed the timid duck has been pooping clear and almost gel like. It also is lacking a lot of energy and lets me touch it, which to me isn't normal. Is there something wrong? And if so, how can I fix it?