At least 1/10 my boa will try to eat his food from the middle folded in half. Once he gets a hold of a spot, there's no letting go! He's going to eat it the way he has it, he doesn't let go and look for a head. It always takes him awhile this way, but he always gets it down, and it stays down. I wouldn't worry to much about yours, it will be fine.
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