Heartys Premium Dry Dog Food Duck & Potato Extra Value Twin Pack - 2 x 15kg Bags. A single source, cereal and grain free food, ideal for any dogs that have shown an allergy to more traditional foods. Analytical Constituents - Protein 26%, Oil 12%, Fibre 4%, Ash 10% Components - Potato (min 35%), duck meal (min 26%), peas, beet pulp, poultry fat, brewers yeast, linseed, digest, minerals and vitamins.