how long?

So, this is Brutus' second feed in my care. Now, I know it's not odd for BPs to go long periods of time without eating, but he's three months old and has only been fed twice, so I'm kind of eager for him to eat. Last week I tried f/t. He didn't eat it. This week, I got him the smallest adult mouse I could find. [no place around here has live pinkies or fuzzies.]

How long do I leave the mouse in there before assuming that he's not going to have some dinner?

So I'm no expert and maybe I did this wrong, but my little guy wanted nothing to do with the mouse in his cage, so I held the mouse by his tail above and in front of him and he was definately interested then and took right to it - probably because that is how he was used to eating his pinkies and fuzzies. But I am new so I could have been wrong doing it that way.:confuzd: