thank you for the helpful responses. i do believe now that the sore can be healed, but it appears to be the least of my worries, i believe i am dealing with an impaction aswell. he has in the past only been eating mice and fish, but recently i added a marbled gecko and three day geckos to the mix, just for some activity, i did not care if one was eaten or even all of them. from that, i had to start feeding crickets, and i believe he has been eating them along with eating the substrate. the substrate is coco peat reptile bark, the type u buy in bricks and add to water. i assume it is not good if eaten. is surgery the only option?