Thanks everyone, when I checked her crop this morning it had gone down significantly. I may have had a unnecessary crop emergency :). Segregating her for feasting seems to be working and the forums have been really helpful. Will take the advice mentioned and not give up on her til she gives up...
I have my first time flock of 3 chicks. Seems like a special chick has a seriously crossed beak. Started to notice at 3 days old and it is pretty severe but, she is eating like crazy on chick starter. She doesn't seem to like yogurt or any other mash I make her but, seems intent on the crumble...