I just had a thought and I may try it later today and just see what happens, but do any of you all can your own beets? That brine that's left over will stain anything it touches, so I'm just wondering what a white feather would look like if I soaked one in the beet juice for a little bit? I don't think it would be red, but more of a purplish burgandy color.
The thing is that it's already got a bunch of vinegar in it and highly concentrated.
I'll do an experiment and see what happens.