It sounds like stress. If he's jerking or running from the food I highly suggest:
1. Leaving him be for 10-14 days and retrying to feed.
2. If you have a glass tank cover all the sides but front in black construction paper.
3. Making sure you have tight fitting and identical hides.
4. Use live appropriate sized food.
5. Do not over offer or change the feeding routine at all. Offer food 1x every 5 days. Don't try anything different to try and get it to eat.
6. Don't leave the prey in for more than 15 min. If it doesn't eat by then or you see defensive striking, jerking, or the running away behavior take the prey out immediately and try again the next week.
Hopefully this helps.
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