They don't last long enough to be worth buying for most of ours. Even the baby, Keck, can eat through the entire roof and split the tunnel in 2 within 2-3 days. We gave her one as a temp house because they were out of wood houses the correct size but it was thoroughly destroyed far too quickly to be useful. The random pieces were then ignored and I gave all the clean ones to the rabbit kits for entertainment in the little weaning cage.