Your hunch on that may be correct, or mostly so. While I'm very hesitant to use any sort of pesticide for any purpose, I will say that I remember reading an account or 2 on another forum about the supposed side-effects of using PAM (Provent A Mite), but in each case, the owner had NOT followed the instructions to the letter, & had returned their snake to a slightly damp cage, whereupon the snake suffered neurological issues & nearly died. So any time the subject of mites comes up, I generally repeat the forum-accepted solutions to use PAM (along with soapy water, etc), but I always say to follow directions very carefully & that it's only for the cage, not to be used on the animal. I suspect that not everyone reads all the instructions though?I also don't doubt that some animals really ARE more susceptible to injury by PAM though. I would think that some species may be more inclined to be harmed, or maybe just the smaller, younger individuals?