Owls produce pellets because they cannot digest certain parts of their prey. Owls regurgitate pellets about 20 hours after an owl eats, and they are tightly compacted masses of hair and bone from the owl
Owl pellets guide: how to identify and dissect - Discover Wildlife
How to sterilise owl pellets
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Owl Pellet Dissection Mini-Kit
Dissecting Owl Pellets-did any one else do this in elementary school??, owl pellets
Barn Owl Pellet Analysis and Dissection - The Barn Owl Trust
How to Find Owl Pellets for Dissection
PDF) The microbiology of barn owl pellets, with special reference to pellets used in educational settings
How to sterilise owl pellets
Dissecting Owl Pellets Science Investigation Lesson