Mission impastable

"It's the start of another school year at Belching Walrus Elementary! Slice, Totz and Scoop are looking forward to finally just chilling with their foodie friends in the cafeteria. It's only the second day of school and already there are whispers about scurrying footsteps in the dark halls and squeaky classrooms. The other foods are totally spooked! Before long, our favorite trio discover that this year Belching Walrus Elementary has welcomed class pets. What are they up to and why is food suddenly going missing?"--Provided by publisher.