BP Unusually Small?

[sufficio]

1) I feed live and I feed at night. Just before I go to bed I drop in the prey item and then 1st thing in the morning I check to see if the prey item is gone. If not I remove the item and try again in 3-5 days.

I'm not an expert, but isn't this dangerous? Especially with rats? I know I've read more than a few stories about live food being left in an enclosure overnight and the snake ends up dead.