Vegan chews made from sweet potato and rice flour. No artificial flavours, colou The tubes are brilliant! Tasty in their own right (we're told by our hounds) but even better when filled with interesting goodies like a bit of wet food, some chicken or mashed veg or even a cheeky bit of liver paste or JR pate! And you can then freeze them like ice lollies for the Summer.rs or GMO ingredients, very low in fat and with a texture that provides the satisfaction of rawhide, but is much easier to digest! Both of these have added superfoods like seaweed and turmeric.