Cats have been eating grass to manage their digestion for much a much longer time than we've been keeping them as pets. Unless we understand the reason, we shou

Cats have been eating grass to manage their digestion for much a much longer time than we've been keeping them as pets. Unless we understand the reason, we should not be interrupting the process. The cat knows what's better for it much more often than we do. For those reasons the linked monstrosity seems at best a torture device, and its operator is far from suited to owning animals