SOLUTION I GUARENTEE IT WILL WORK:

1.) Get a tub and cover all 4 sizes with black paper or something to hide light
2.) If its a baby get a live baby rat fuzzy (no eyes open) or just live mouse fuzzy. For adult idk. The reason you get them with their eyes closed is so you dont have to watch over them. FEED LIVE, ITS THE ONLY GUARENTEED WAY IT WILL EAT
3.) Put your snake and the baby in the tub, close it and when you come back in an hour it will be gone.

If your snake is hungry it WILL EAT LIVE.