Where I got my snake told me 24 to 36 hours. But I also have a bp that's about a year or slightly older now. Don't be afraid if the bite you. Mine (Prada) did because I was handling her a little rough and it was feeding day. I had stupidly handled the mouse first. I was more shocked that she did it than it hurting. Her teeth are so tiny and thin it was probably equivalent to a quick poke with a very thin needle.

You can see the outline of her cute little mouth. I'm glad it happened cause now I know it doesn't hurt. And they will more than likely only lash out when they have a reason to. Handling wrong, haven't been fed and you smell like their food.