We have two pet chinchillas at our house. They live in a very large cage in our living room. (It's four feet tall and about three feet wide.) Sadly, chinchillas get bored fairly easily. We have some big pieces of apple wood for them to climb and chew but we don't have any clamps or anything to hold them into place. As a result, the wood is just sitting in the bottom of the cage. Not really climbable, in my opinion. Maybe I should call a woodworker to see what they might use to clamp a piece of wood to a metal cage.