From BunnyLady.com…..
If you have rabbits at home, you know that they’ll chew on anything. They’ll chew on cardboard, furniture, and any kind of twigs, branches or toys you can find. Unfortunately, not all types of wood are safe for rabbits. Before allowing our pet rabbits to chew on toys and wooden objects, we’ll want to make sure we know exactly which types are toxic for rabbits so we can avoid them.