My pine snake ingested a large piece of bark when I had her.. she was just fine. I feed all my snakes in their vivs, but I keep anything under 2 years on paper towels and I dry off the mice before feeding so they don't turn into an aspen ball. However, I use very fine aspen, so even if a piece were to get eaten, with the size of the snakes in consideration, it should all pass through okay. I keep my hognose on aspen too, I just feed him on a solid surface, like his hide so the aspen doesn't get stuck on his fuzzies.