Well, one of the reasons to use vinegar is that it's safe, though usually a bunny finds the smell so repulsive that they wouldn't drink it. You probably had it diluted enough that she didn't mind the smell and had a taste. I wouldn't worry, but there's no harm in giving her veggies a good soaking, and possibly offer her some fresh, cool water right now to give her the chance to drink it on her own. You might give her a well washed piece of something, like a piece of a favorite green, to eat right away as well so she can just move it along past her throat. Blech.

Wow. I just washed a new pair of pants in vinegar and water so I kind of did a double take when I saw your post. Can you get her to drink clear water now? I don't want to suggest syringe feeding her water because there's a risk of her inhaling it and aspirating which you don't want. (I also avoided suggesting a juicy apple because it's more acid in her tummy.) She is just being a goofy bunny who obviously hasn't read the rule book on what bunnies do and do not like. I think she'll be OK, but a bit of moist food should help move things along so to speak. Maybe a banana slice, or some unsweetened pumpkin if you have some.

Bunnies have a way of scaring us with the weirdest things. Then I swear they laugh later on.

How is your bunny today?

She's doing okay. Just a little irritable since I can't seem to get rid of her fleas, but that's another topic. =p The vinegar doesn't seem to have had too bad of an effect on her. She's had some small dry poops but I made sure to wet her greens again that I gave her this morning and she seems to be doing fine. Thanks for asking. =] No worries though. I'm taking her to the vet for a general check up any way on Wednesday. If anything's really wrong the vet will be able to help out. =]

I don't see why a tiny taste of vinegar would be an issue. I have chickens and a lot of people give apple cider vinegar in their water. Same with horses.

I had read that apple cider vinegar can be diluted (very small amt, since most don't like the smell) in water for animals as a treatment for fleas.  It is supposed to be a natural treatment.

Vinegar is just an acid, like that found in fruit (especially citrus) so it's perfectly safe, especially in small amounts.