I do feel pretty strongly about this so if this comes across as rude, I apologise.
I have personal experience with getting a rabbit from a situation like this. Buttercup, Thumper and Skittles came from a family who left all three of them in their back yard and fed them dog food. Something that was always a highlight for them was when the owls would come and perch on their fence to watch the rabbits in their yard.
I've had Buttercup for a year now and she is STILL extremely timid and gets stiff as a board when you hold her. She'll thump when you enter the room and runs when you attempt to pick her up. She is getting better, to the point where within the last month or two, she has started venturing over to say hello but will dart away if you make any sort of quick movement.
Things like this are extremely traumatising, especially since rabbits are pretty much on the very bottom of the food chain.
If she can hear rabbit screams from other bunnies dying, that's pretty much the natural signal for them to get the heck out of dodge. If you're bunny is inside the house it should help, but the sounds are still going to be easily heard for your bun... Don't know what to suggest for you. Unless your rabbit is outside, to which case, you should bring them in.
