Nature's Variety offers Instinct Pork Formula. The diets are formulated like the company's raw diets, made with 95 percent pork and liver and 5 percent vegetables, fruits and wholesome ingredients, the company states, adding that the protein option has been specially formulated for easy rotation into a pet's diet, and it is complete and balanced for all life stages. The diets are available in 5.5-oz. and 3-oz. cans for cats and 13.2-oz. and 5.5-oz. cans for dogs.