oh, I just thought of something else. There is also a possibility that she is deficient in certain vitamins, like vitamin D, which helps to absorbs the calcium.
@cheezenkwackers @KathiQuacks might know what’s a good form of the vitamin D and anything else to supplement with
i had a couple of ducks who didn’t like the oyster shell in crushed form so I got the oyster shell in the flaked form and they seem to like that better, I also save all of their own shells,. I rinse them off in hot water, let them air dry, and when I have enough to fill a cookie sheet, I bake...