Hi, my rabbit is a year old and has been peeing this weird looking sandy stuff. I think it might be bladder sludge, because this is not the first time she has peed this sandy stuff. I read that if you take calcium out of there diet that it will solve the problem, but I also read that it does not work. What I'm wondering is does this look like bladder sludge. And what can I do to help her. Her diet is made up of unlimited Timothy hay, pellets and veggies every other day. Her veggies are usually Romain lettuce, celery, kale, and cilantro.