I agree these are defensive hits and not feeding attempts.
Check your temperatures first - if he's cold he won't eat. What are the ambient temperature and the surface temperature of his substrate/paper on the warm side, as measured with an IR thermometer or temp gun?
How big is his enclosure? Does he have two hides, one on the warm and the other on the cool side? What's his humidity? Have you been trying to feed him in or out of the enclosure? Have you tried just leaving the f/t feeder with him in the enclosure and then walking away? What was he eating for his prior owner?
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