If you're having feeding issues, try live a few times until he can eat more consistently.
What is your husbandry like? A snake will go off feed if the enclosure or temps are off.
And feed in the enclosure. And do not handle your snake until it eats at least 3 or more times. Handling, moving your snake back and forth, and bothering it too often can result in it going off feed due to stress. Leave it alone for at least a week before offering its next meal.
Remember, do not handle your snake until it eats regularly.
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