I would leave him alone for a few days (even until next feeding day). Then you should try pre-scenting the room if you haven't already done so. Blow drying the thawed rodent the first few F/T meals is a great way to get them interested. Mine are conditioned already to just take the thawed rodent that I place in their tubs. But I started with zombie dances, blow drying, & pre-scenting. All 18 of mine now accept F/T with no issues.

Feeding in a seperate container or not depends on the keeper's preference. I feed in their enclosures and have never had any of my snakes strike at me during non-feeding days. However, I've heard of many who feed in seperate containers & are succesful with that method. It also depends on the snake. Some are stressed by being moved around, some are not.

Last thing: Some of my BPs refuse food while in shed & some don't. I'd say it's 50/50 with mine.