I'll do a whole blog on food tubes and what to put in them one of these days. (eileenanddogs.com)
Using your KitchenAid ® 9 - Cup Food Processor fitted with the slicing disc, and adjusted to the size you want your onions, place your 1/2 red onion in the largest opening of the wide mouth food tube. (blog.kitchenaid.com)
According to Richard Goldstein, DVM, an associate professor of small animal medicine at Cornell University's College of Veterinary Medicine, a spit - up hairball's elongated shape is imparted by the narrow food tube (esophagus) in which it develops or through which it passes on its journey from the cat's stomach to the outside world. (www2.vet.cornell.edu)