Everyone says to give the girls oyster shells, but my question is- does it have to be oyster shells? Or is it just because thats what they sell? We eat a ton of crab and clams. Breaking it into little pieces isn't too hard. This occurred to me the other day as they were eating crab bits that fell onto the ground as well as picking at the broken bits of seashells that had fallen out of our beach bag. Thoughts? Facts?
Makes sense, right?