There isn't actually any conclusive research on this. You should feed according to :
1. what your snake will eat
2. what is in the snakes best interest
3. what is easy or convenient for you to get (based on price, availability, what you want to feed, etc).
if that is live, pre-killed or frozen/thawed then so be it. just be aware of the risks of each type of prey (every prey type has them, they are different though, even frozen thawed).








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