all of mine have just grabbed them when offered. try to keep you self hidden when offering it. you are a huge heat signal when around the snake. i heat the rodent as hot as i can get it without bursting it dry it off, and then crack the tub open slightly then stick the rodent in and bounce it around like its alive and they have hit it every time. after the first couple of times like this, they take it no matter what.

good luck