We have just started full room free roaming and I'm discovering the very cheeky and daring personality of one of my boys, Remus. He ended up in a large plant pot this morning, happily digging through the soil. I managed to get him out before he did too much in there but I saw his happy little face! I'd love to try them out with a dig box filled with soil that's safe for them to be in. Can anyone help with rat safe soil or compost suggestions?