I agree with Lucy. Was going to suggest the same thing. I would basically just try to ignore bun (what is her name?) as much as possible but sit in the room with her with the crate open. Have something to keep you occupied so you don't get bored waiting! So you could watch TV, read a book, whatever. Maybe put a few treats in the room as well. And just wait for her to feel comfortable to come out and say hello. Don't go after her - if she comes to you then let her, maybe try stroking her if she'll let you. If not then just leave her to explore on her own. Hopefully when you've done it a few times she'll start to learn that you're not a threat and will come out more often to say hello!