DoggyRade Prebiotic Superfood Chewies are tasty prebiotic chews that support your dog’s immune and intestinal health. These chews contain natural fibre prebiotics to promote the growth of beneficial bacteria in the gut. This range of healthy chews also contains different superfoods that are a good source of antioxidants, fibre, beta carotene, alpha-linolenic acid, vitamin A, vitamin C, vitamin D depending on the flavour.