Has she had any change in her diet recently? Like Jersey said it is normal for bunnies to excrete out some extra calcium, but I think it’s something you have to watch if it becomes consistent and/or thickens.
Having a bunny, like Jack, who does have problems with how his body processes calcium, has made me more aware of how much is too much. He was always one ot have some calcium excretion,—not much but then as he aged, it became a serious problem for him, and he developed a bladder stone, and now if he doesn’t drink enough water, his urine gets thicker (when it dries, it actually turns to powder) and he can also get thick sludge if I don’t manage it properly with fluids I would rather see sludge than have it build up to a stone, but sludge can scar and irritate the bladder so that’s not good either. (So I just am careful to make sure that if he doesn’t drink enough water, then I give him sub-q fluids).
It would be nice though to have a solid answer with photos of what would be considered “normal healthy calcium excretion” in comparison to something that would be considered a health issue, so people can feel more confident about whether it’s a real problem or not for their bunny. (hmmmm…..something to work on. Great to research and talk to my vet about )