You don´t want to feed him the first day you got him. Offer again in a week. Let him settle in and if possible, get a smaller enclosure.
I´m curious, what are you feeding him, and how much does he weigh?
https://ball-pythons.net/forums/show...-hatchling-101 < A useful post, by Deborah.
https://mypetpython.com/the-ultimate...hooting-guide/ < Troubleshooting.
https://ball-pythons.net/forums/show...ing-Guidelines < Keep in mind these are guidelines, not explicit rules.
https://www.reddit.com/r/snakes/comm..._from_live_to/ < F/T feeding methods.
Edit: How many hides do you have?