Sorry I might've missed this but how long have you had the snake for? As someone else has said you should leave it alone for a week if you haven't already
As for the feeding issues, the strikes are probably defensive instead of feeding strikes. He's stressed out and needs some time alone to chill. Whenever you have a refusal wait at least a week to offer again because constant offerings get stressful.
And I don't think you should try live yet. What was he eating before you got him? If the snake's left alone with proper husbandry he'll eventually get hungry and eat so unless he starts losing weight I'd keep trying the f/t.
If you do decide to go live, I wouldn't stun the mouse. It sounds cruel
Also when I feed Kassadin I usually hold the rat with the tongs at the scruff of its neck so when he strikes the rat won't dangle out of place. Heating it up helps him pinpoint the rat's head too
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The hot spot bedding shouldn't feel warm or hot or anything so don't judge off of touch. You definitely should keep the thermostat between the UTH and tank. The thermometer probe should be under the bedding directly on the glass for a proper reading.
Also get a temperature guns they're hella convenient!
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