Cesar Gourmet Filets Filet Mignon Canine Cuisine

How can this be a good product for dogs when it contains Onion Powder?Important Information. I was always told to keep my Yorkie away from onions!! & again what are meat by-products & do I want to knowIngredientsSUFFICIENT WATER FOR PROCESSING, CHICKEN, LIVER, BEEF, MEAT BY-PRODUCTS, STARCH, WHEAT GLUTEN, PEA FIBER, NATURAL FLAVORS, SALT, CARAMEL COLOR, MINERALS (POTASSIUM CHLORIDE, ZINC SULFATE, COPPER SULFATE, POTASSIUM IODIDE), SODIUM TRIPOLYPHOSPHATE, IRON OXIDE, GUAR GUM, VITAMINS (VITAMIN A, D3, AND E SUPPLEMENTS, d-CALCIUM PANTOTHENATE, THIAMINE MONONITRATE [VITAMIN B1], BIOTIN), FILET MIGNON FLAVOR, ONION POWDER, BAY LEAVES, DRIED YEAST, GARLIC POWDER