human overseer. Cats were shot the first day, dogs the second, and other animals on the fourth. A total of 66 puppies were used for the show in 2014, including a basset hound with a genetic defect to its paw. This allowed 12 to 15 puppies to be on the field at a time, and for puppies to be given rest periods every 20 minutes. Another 30 untrained kittens, five penguins, three trained adult cats, eight "tailgate party" dogs, four police dogs, and six hamsters were used in the 2014 show. All the animals except the penguins (which were provided by the Columbus Zoo and Aquarium) are adoptable. In 2015, 37 shelters from around the United States and Puerto Rico submitted 85 puppies for the event, of which 55 puppies were chosen to be on the air. Another 25 kittens were used for the half-time show. Forty-four shelters and rescue groups in 25 states provided 49 animals in 2016. (Eighty-eight animals "auditioned".) Videoing returned to an eight-hour-a-day, three-day format in 2016, with two days used for videoing puppies and one day for kittens and other animals. Sixty personnel were needed for shooting. Puppies were grouped by size (small, medium, and large) for on-field play. For Puppy Bowl XIII, 34 shelters and rescue organizations in 22 states and Puerto Rico provided the 78 puppies featured on the show. Puppy Bowl is shot inside a miniature Plexiglas "stadium" that is long by wide. Only puppies between 12 and 21 weeks old are allowed on the show, and there is a height and weight limit due to the size limitations of the play area. Puppies must show that they are well-socialized with people and with other puppies, and that they have the full range of vaccinations. A wide variety of toys are placed inside the "stadium". Although there is no minimum or maximum limit on how many toys may be in the stadium, show producers say that toys which make the loudest noise or which are sausage-shaped get the most attention. Toys are usually switched out every 20 minutes, and often more frequently. Peanut butter is smeared around camera lenses to induce the puppies to lick the camera. About of peanut butter are used for the taping, along with of dry dog food, 500 dog treats, and 250 toys. The various cameras used to tape the show generated about 50 hours of footage