I don't use Yesterday's News because of a horrible experience with a poor shelter bunny.
This beautiful Jersey Wooley had a blockage, I remember the staff tried oval, fluids, etc because they assumed she had consumed her fur. The poor gal died, and the necropsy showed that she ate the yesterday new's litter, and it had formed into a ball in her stomach which she couldn't digest.
But please don't let this story influence you for the bad! We also had a shelter rabbit die while choking on hay in the middle of the night, but that doesn't mean that I wouldn't take hay away from my rabbits.