Barking Heads Fat Dog Slim has been specially formulated for dogs who are watching their weight. This delicious grain-free recipe with added vitamins & minerals has been slow cooked to paw-fection, using only the best quality, natural ingredients. Made using a delicious blend of fresh chicken, garden veg & herbs, this reduced-fat recipe is ideal for those dogs looking to lose a pound or two! Low calori, reduced-fat chicken. Eveytthing you need to feed a happy, heathier dg. Natural Ingredients - free from artificial colours, flavours & preservatives. Reduced-Fat. Added Vitamins & Minerals. Grain-Free Recipe.