Owl Pellets for 7th Grade?

Mrs. Smith's 7th grade class recently researched and dissected owl pellets. Mrs. Smith noted that the main purpose of this project was to give the students practice with investigating open ended mysteries.....What did the owl eat? This lab was fun and unique as the students had to study the data closely and research all possible answers. There was no answer key and practicing good lab techniques, procedures, and safety was also an objective.