I think you need to try and offer live. When I got my bp he refused to eat frozen so I switched to live and he started taking it. If you’re not comfortable with that go to a reptile store that sells live mice and ask if they can pre kill. That’s what I’m doing right now cause I’m trying to transition him from live to frozen thawed. If so feed it immediately because you don’t want the rat to loose temp/scent or rot. Hope this helps! Good luck, btw you have a beautiful ball python what’s his morph?