Whilst owls have a strong acid in their stomach, it is not
strong enough to digest all of the fur, feathers or larger bones,
though softer bones are digested.
No. Many pellet mills are designed for making animal feed
pellets. These pellet mills can make fuel pellets from softer
biomass materials like leaves, lawn clippings, and pine needles or
a mixture of these softer materials with sawdust, but it's not
recommend that these pellet mills for making 100% wood pellets.