One of my free roaming reds has a crop that has opened to the skin surface. This has occurred rapidly, crop not swollen two days ago. She is still eating, laying and seems to feel fine. Seeing vet in am. She is a pet, approx 7 mos old. First chickens I've had and I don't want to loose her. Think she may have eaten some insulation causing this (has ben removed). Anyone experienced this? I'm finding lots of info on impaction but not fistulas.