Small animals will love using The Living World TreeHouse Real Wood Logs as building material. They will also enjoy gnawing and carving the flexible wooden sticks just the way they like them. Made of all natural wood, assembled using non-toxic glue and dowels, not nails. The Logs are completely safe to chew and keep teeth healthy. The logs can also be shaped into a fun playground for your pet to hide in. Large: suitable for rabbits, ferrets and guinea pigs. Other sizes available: 61405 Living World TreeHouse Real Wood Logs - Small 61407 Living World TreeHouse Real Wood Logs - Medium