aww, they are so cute. But it looks like they're gulping it up. It would probably be natural for them to eat it in the wild.
The best part is, those plants will most likely regrow, did they take the first 2 ft of the top soil too? Probably not! I am sure seeds are there anyways. If she covered up the plants no one would know.
Just because she was 84 doesn't mean she didn't know what was up. I actually just read that (for health's sake) it isn't safe to feed ur bunny leaves but buds are fine....? I know a certain German granny that would beg to differ!