I’m interested to know what you’d fill it with also.
I had thought to do something like this before using sand. I posted here but there were some concerns sand could get in eyes. I had read somewhere (
somewhere….) that you could use a combo or dirt and sand. I even thought damp sand could work. Could either of those be a health risk though? I let mine outdoors anyway and they scratch around in the dirt already. I can bet mine would pee in it at some point so if it’s fill with sand/dirt, that’s not a big deal. Today when I came home I was looking at the big amount of autumn leaves in my front yard. They smelt so fragrant and I thought that the buns would love to rustle around in them and eat a dozen too! Thinking that could be another possible filling. Here you can get these shell shape pools/sand pits for kids which I thought could work well.

My doe used to be a digger when a bit younger. I’ve noticed my buck will dig and scrape in a litterbox if given a chance. So I think they’d both give a diggy zone a go. It’s good to switch things up for them sometimes.