My bearded dragon, Shacky, is about 18" long now. I'm not really sure how old she is but I got her back in July from a pet store and she was 9" long then. Recently she has seemed a little chubby but I'm not sure if she is just eating too much or if she is even old enough to be getting ready to lay. She hasn't been restless for long periods of time or stopped eating, but she started eating her sheds which I think I saw somewhere was a sign they need more calcium so I started dusting her feeders with calcium more often. Just in case, I made her a lay box with plays sand but she doesn't seem interested in digging or burrowing at all. I had read that sometimes you just have to put them in the box for periods of time and then when they're ready they will do it. I tried doing that, but she just seems to want to eat the sand. She's done it twice and both times I took her out of the box and gave her some superworms. I'm worried that she won't be able to safely use the lay box because of her interest in consuming the sand. Is there something else I can use instead that she will be able to safely digest if she happens to eat some of it?