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[ssssnakeman]

Steve, a snake that bites itself is usually experiencing pain in the area of the bite.,,Maybe it has eaten something which didnt agree with it..
It wont need heat , unless your keeping it in an airconditioned room, and even then i wouldnt give it a lot.
Im pretty sure tigers are immmune to tiger venom, but the jury is still out on weather copperheads are.
You have a pic of your tiger?
Good luck with it.
Baz