I got my BP as a present, and they got him from LLL reptile. He was a hatchling and I think yours probably is also a very small baby.
He didn't eat for a couple months in the beginning, and another member on the forum had a snake from the same clutch and he passed away.
You need to make sure your husbandry is spot on. Get the baby in a small and simple enclosure.
A small live adult mouse left in for a couple hours in the middle of the night worked for me, finally!
He took a very long time to settle in.
Now he is a big boy and doing pretty good![]()