I am starting to give my cockatiels wood so they use it as a toy, destroying it. I know there are many toys made out of wood, but isn't it possible for them to get hurt with the splinters if they eat them?
We have 2 African greys, about 25 and 20 years. We have found "a busy beak is a happy beak". They love to tear things apart, never had a problem with splinters. Their favorite is chicken leg bones, they turn them into sawdust getting the marrow. Chicken bones are probably too big for cockatiels.