Your situation is very unique. My experiences with holbrooki give me the opinion they are pretty bullet-proof, at least as adults. I have heard CB hatchlings can be tricky to get started on rodents and most require lizards, or even other snakes to get feeding. I have also seen some receive a bit of neglect and not suffer with skin ailments due to less than perfect husbandry. In fact, all the holbrooki I kept were always likely to burrow around and tip over their water containers, no matter what I used. So, they would have to sit in damp conditions until checked for the day and cleaned up. I can see it being possible that the population from the area of LC you collect from has a food preference, but why the radical behavior from rodents is beyond me. I can see them not recognizing as rodents as food, but this population seems to be responding to rodents as enemies/predators??? Obviously the blisters would require a vet exam/culture to ID the cause, but I can see stress being a factor. Does this population of holbrooki appear to be on the smaller side?

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