Burgess Excel Mint Guinea Pig Nuggets. Excel products are specially developed to create food that is healthy and tasty for guinea pigs. Nutritional Additives per kg: Vitamin A (retinylacetate) 25,000iu/kg, Vitamin D3 (cholecalciferol) 2,000iu/kg, Vitamin E (dl Alpha tocopherol acetate) 125 mg/kg, Vitamin C (L-ascorbic acid monophosphate) 1,050 mg/kg, Copper Sulphate Pentahydrate 28 mg/kg, Iodine (Calcium lodate anhydrous) 2.34mg/kg, Sodium Selenite 0.22mg/kg, Ferrous Sulphate Monohydrate 133mg/kg, Manganous Oxide 16.1mg/kg, Zinc Oxide 139mg/kg.