When my brachy vegans turned up it was abit bigger than I was expecting so had to make die with a container that wasn't exactly purpose built. It's fine temporarily but my question is , now that he has started digging he has reached the bottom and there isn't a layer of substrate on the bottom of his burrow. I wouldn't have thought this is an issue but would I be correct in assuming it means his enclosure isn't deep enough? I have to replace it anyway as I don't particularly want to keep him in there but would I need something significantly deeper? It's around 3 inches of substrate