Description PREY Angus Beef Formula for Dogs features pasture-raised Angus beef as the first of just four key ingredients. Despite having limited ingredients, your dog won't miss out on flavor or nutrition. Guaranteed probiotics help support digestion, while precise levels of vitamins and minerals, guaranteed antioxidants, omega fatty acids and DHA help ensure your dog gets the complete nutrition he needs, all with the rich, red-meat taste of beef dogs crave.