Unless they are feeding live there is no reason for it. When you think about and read some threads here feeding in another cage actually raises your chances of getting bit since you are moving a snake in feed mode and may smell like food.
You can see my collection below and you probably know that some are some very aggressive feeders. Good luck my gtp into another cage or my 30lb blood. No thanks!
Maybe try a f/t that smaller than its regular prey. My BRB refused f/t for a good while and acted as if he was afraid. I cut down the size of the feeder and BOOM. He hammered it! After a few weeks of feeding the smaller prey I went back up in size and he hammered it too. He has not refused them since.