I have a burmese the same age and first off these are lethargic animals, the only times these snakes move other to do with breeding is, to find heat for digestion, to find water, and to find a safe place, and sometimes for food but they are ambush predators so this is not often, the Reticulated Pythons will actually chase after a prey item. My snakes head is jerky aswell I think its fine, just don't think about and it won't bother you.
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