It's probably absolutely nothing to worry about. Dragging their rear for more than a couple days can be an indication of parasites, worms or an allergy.
I've never met a dog or cat though that didn't do the rare and occassional "itchy-butt drag" now and then. One or two days maybe, then they're fine for months or years. She probably just ate something that didn't mix with whatever other food was in her system. It is embarrassing though, isn't it?
No more jalapenos!
