What kind of wood can be used for horse bedding? Can hard wood be used?

Only soft woods such as spruce, fir and pine are completely safe for the fragile respiratory tract of horses and other animals. In contrast, hard woods, such as oak and walnut, may contain toxins harmful to animals.
All Royal Wood Shavings products are made from primary-processed soft wood to provide your precious companions with safe bedding that meets their specific needs.