Yes, possums are found to be immune to the venom of most snakes which makes it perfectly safe for them to eat snakes. Scientists have figured out that there is a compound in possums’ blood which makes it immune to snake venom1. This compound is a peptide that can act against a snake’s venom
I'm sure Hazzard CO. was like every other place in the south including where I'm from ( middle Tn.!) we had what Yankees call
Oppossums......around here they're just possums! ...road killl etc. they can't be killed by poison snakes! and there's a bunch of other neat stuff about them!