My Snake didn't eat the first time I presented food to him. He seemed more scared of it than hungry. I thought it was due to him being scared of the small rat so I got him an adult mouse which he took. Turns out, he was going into shed at the time, so he was basically just grumpy from being in shed. The next week, he ate a small rat like a champ.
Just leave him for a week or two. He's probs just stressed out. Check for signs of shedding as that may be a culprit.
A good feeder will eat with or without a hide. Mines will take food in or out of a hide
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