I haven't given them any additional vitamins or supplements. The ingredients in the feed is (Organic Corn, Organic Soybean Meal, Organic Wheat, Organic Wheat Middlings, Calcium Carbonate, Monocalcium Phosphate, Diatomaceous Earth, Salt, Organic Soybean Oil, Sodium Sesquicarbonate, DL-Methionine, Choline Chloride, Manganous Oxide, Zinc Sulfate, Ferrous Sulfate, Copper Sulfate, Calcium Iodate, Sodium Selenite, Dried Bacillus licheniformis Fermentation Product, Ground Limestone, Organic Vegetable Oil, Dried Talaromyces versatilis Fermentation Product, Hydrolyzed Yeast, Yeast Extract, Yeast Culture, Coconut Oil, Vitamin D3 Supplement, Vitamin E Supplement, Niacin Supplement, d-Calcium Pantothenate, Riboflavin Supplement, Menadione Sodium Bisulfate Complex, Vitamin A Supplement, Pyridoxine Hydrochloride, Vitamin B12 Supplement, Thiamine Mononitrate, Biotin, Folic Acid. *May contain trace amounts of other agricultural ingredients.) It has vitamis including Thismine Monoirate is that alright being haven't given anything besides the water and Corid?