I've supplemented the meals of rescues or breeding snakes in the past with reptile multi-vitamins. I just put a little powder into the dead rodents mouth, the snake
doesn't know the difference, & I think it may help &/or couldn't hurt. I've also heard ppl talk about using bird vitamins (Avitron, I think?), very similar to herp. vits.
Snakes that have skin issues heal very slowly...hang in there. (-the skin doesn't seem to get the priority nutrients when it comes to survival-?)