My BPs are very good eaters, so I usually just toss the suckers in... they both strike within a minute, although Delilah usually waits for it to approach her. And the last time I fed Toby he was a little sleepy, so I bopped him on the nose (with the mouse) to get his attention. I don't bother pre-scenting since I feed live, but I'll usually let them catch a sniff from the mouse's box. I'm hoping to get them on F/T in the near future, and then I'll pre-scent for a half-hour before offering it.