New BP hasn't accepted a meal in 3 weeks.

[JRLongton]

Try feeding her in her enclosure. The handling right before feeding might be putting her off.

Right there. I've never heard a good reason to feed a BP in a separate feeding enclosure.

I handle BP feedings as almost religious ceremonies. Only at night, total silence in the house, dim lighting, nobody but myself, minimal distractions. Once the snake bites and coils, all lights go out and I leave the room. BPs need to feel secure to eat.