I wonder if some of his early refusals of the f/t were just being shy in a new place before he had fully settled in? I have one particularly shy 2018 BP who will take F/T now after she took a live meal with me first, but will instantly drop it and not eat to watch me if I stay close, move her tub, or move at all... it's a juggling act with her. May be worth a repeat try in the cage with f/t just to see if he's more interested now that he's settled more, and presumably eaten(?). (I haven't seen all your posts, so sorry if I'm mistaking what you've said here!)
As for the original topic. I just got a new BP from an expo and due to recent stocking issues where I have access to live mice/rats (i.e. always out of smaller sizes like baby BPs need.. fuzzy/rat pups and adult mice), I did grab several mice at the expo. She has only had live mice previously and I'm planning to attempt a switch to frozen after a few solid meals with me. But in the meantime, I have a few mice in a bin-cage in my QT room. I don't have any other rooms to put them in and don't want feeders in my main snake room with my more food-motivated species.
It's only been a few days and I can't say how much of her watching is smelling food vs her personality, so I'll have to update later if I have any issues, especially once she's settled enough to do some handling.
I don't plan to do keep mice there long-term, though I've considered using the QT room for rat breeding if I get too many more rat-eating snake species... not enough space in the main room and no other spaces available at my house.
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