So as they roll it, kibble spills out randomly? We have a Buster Cube that works the same way for dogs, though our dogs use it as a party Toy.
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."