I have many terrestial Ts from genus Brachypelma, Pamphobeteus, Grammostola, Phormictopus, Xenesthis, Chromatopelma, Lasiodora, Acanthoscurria, etc etc... Literally none of them uses its hide at all and they never even try to dig. I read everywhere that 4-5" substrate is necessary for them. I used to add that much but none of them digged at all so nowadays I add only like 1" of substrate and I never see any of them trying to dig a hole. They don't use their offered hides either. Why is that? I see pics about hiding adult Ts like B. albopilosums, I have one, she still has a lot of substrate and flowerpot hide, she never used it. All of my Ts just standing at the middle of the enclosure. When I get a new T or rehouse one, I always use a half flowerpot to create a hide. They usually destroy it or simply just don't give a damn. I have no idea why my Ts never hide or dig...