Roo and Beef Also known as the Grey Hound Mix, this has been used by the industry for many years. If your pet is extremely active and is struggling to keep weight on due to there activities, this is a mix that is an economical balance of roo and good beef fat for energy. It also introduces the beef taste with the roo gamey taste if some animals struggle with the straight roo. The Beef is measured to 12% to allow an overall fat content of around 10% so that the fat is a known measurement. Mince is most beneficial to the young dog with juvenile teeth and the old who struggle to chew. Very Popular with Cats / Kittens / Puppies and Grey Hounds Industry.