On mine the first two levels are very sturdy. The top one is a bit wobbly but only houses one piggy in at the moment (I think you can make them sturdier by following guidelines using bits of wood on cavycages). I've actually bought two hutches and they're moving outside once the weather warms up as I find it too hard to clean out - however that's only due to the vet bed, as you don't use that it shouldn't be a problem. I made doors on each level that open for access and the pigs have no problems going up and down the ramps. They love their home so I feel guilty putting them outside in the shed but the vet bed washing is neverending with our own washing. I'm going to keep it as intact as I can and put it in the shed for overspill piggies.