My Ducks share a coup with some chickens who's owner just bought PAYBACK EGG LAYER RATION. Will this hurt my ducks? I have read some threads saying that medicated chicken food is bad for ducks, I don't know if this is a medicated food or not. Ingredients are listed below. Thanks. PAYBACK EGG LAYER RATION For Laying Poultry. GUARANTEED ANALYSIS Crude Protein not less than 17.0 % Lysine not less than 0.85 % Methionine not less than 0.4 % Crude Fat not less than 3.0 % Crude Fiber not more than 5.0 % Calcium not less than 3.5 % Calcium not more than 4.5 % Phosphorus not less than 0.6 % Salt not less than 0.25 % Salt not more than 0.75 % Phytase not less than 850 Ftu/# INGREDIENTS Grain Products, Plant Protein Products, Processed Grain Byproducts, Calcium Carbonate, Porcine Meat and Bone Meal, Animal Fat (Preserved with BHT), Monocalcium Phosphate, Dicalcium Phosphate, Salt, Vitamin A Supplement, Vitamin D3 Supplement, Vitamin E Supplement, Vitamin B12 Supplement, Riboflavin Supplement, Niacin Supplement, d-Calcium Pantothenate, Menadione Sodium Bisulfite Complex (source of vitamin K activity), Thiamine Mononitrate, Pyridoxine Hydrochloride, Folic Acid, Biotin, DLMethionine, Copper Sulfate, Ethylenediamine Dihydriodide, Ferrous Sulfate, Manganous Oxide, Manganese Sulfate, Sodium Selenite, Zinc Oxide, Zinc Sulfate, Choline Chloride, L-Lysine Hydrochloride, Kaolin, Cellulose, Hydrogenated Vegetable Oil, Dextrin, Starch, Condensed Fermented Corn Extract, Dried Aspergillus Oryzae Fermentation Extract. FEEDING DIRECTIONS PAYBACK EGG LAYER RATION is a complete feed for chickens during egg production. Begin feeding this product free-choice when egg production begins. Continue feeding throughout the laying stage. Provide chick sized grit and fresh, clean water at all times.