Unlike humans, owls will regurgitate matter that is indigestible. Make sense considering owls will scarf down an entire mouse or bird without thinking twice. The pellets could contain hair, bones, teeth, claws and even bird beaks! While it may seem a tad gross, it’s a fascinating look into one of nature's most accomplished predators. Plus, you’ll be really glad owls aren’t big enough to see us as prey. Seriously, that would be a Hitchcock nightmare come to life.