Dermatophagy: Waste not. want not? A panoply of amphibians and reptiles regularly feast on their own shed skins or those of their brethren, researchers report in the June JOURNAL of HERPETOLOGY. Scientists previously viewed this practice, called dermatophagy, as a freak occurrence, but a new survey of more than 100 zoos and aquariums worldwide has documented it in 285 species of frogs, salamanders, lizards, snakes, turtles, tuatara, and caecilians, says coauthor Paul J Weldon.
just something i found on the internet. it's not common for a snake to eat it's own shed, but it was just a thought since no one else has any ideas