A while ago, a good friend that refered to herself as dovetail*??????? said that she was communicating with certain friendly fowl. Certainly Owls, but what else? I have decided from certain clues that swans are definitely involved. But wouldn't swans atract too much attention at her prison? Well, I think that since swans, owls, and eagles all make singular noises which can be heard from far away. They probably communicated from afar. As to Dovetail, she escaped. I'm not sure how, but perhaps the same way as Barty Crouch or maybe she pulled a Sirius Black.
I'm still wondering about that armed guard. Maybe he was-well I have no idea.