Can I see a picture of the enclosure? And can I have exact measurements on the temps and humidity? A large enclosure for a baby sounds like it might stress the animal out although if you have enough clutter (fake plants, hides) along the tank then it’s okay, but if it’s just two hides and a water bowl, then it can potentially be too much space and is making the animal feel less secure, which could end up in it refusing food.
My snake took a while to get on f/t but I just had to keep trying. You can also try heating it with a blow dryer on top of the animals tank to get the scent and have the animal already ready to eat when you put the mouse in. Try leaving it in there over night. Since it’s f/t there’s no risk of leaving the prey in the tank unmonitored.
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