Why Boxer dog's die young

We feed our dogs frozen Bil-Jac. Bil·Jac is made with fresh meat for wholesome, natural protein. INGREDIENTS Beef, Meat By-Products, Cereal Food Fines, Poultry, Poultry Meal, Animal Liver, Fish Meal, Eggs, Cane Molasses, Dried Beet Pulp, Wheat Germ Meal, Brewers Dried Yeast, Phosphoric Acid, Vitamin A Acetate, Vitamin D3 Supplement, Vitamin E Supplement, Riboflavin Supplement, Salt, Niacin, Biotin, Choline Chloride, Folic Acid, Thiamine Mononitrate, Pyridoxine Hydrochloride (Vitamin B6), DL-Methionine, Vitamin B12 Supplement, D-Calcium Pantothenate, Manganous Oxide, Inositol, Ascorbic Acid, Ferrous Sulfate, Copper Sulfate, Zinc Oxide, Cobalt Carbonate, Potassium Oxide, Sodium Selenite You can buy at Krogers in the dog food section in the freezer. The rott can't eat anything else. If he does he pukes everywhere. Nothing like cleaning up puke at 2 in the morning. It has also helped with his ringworm. All your boxers are so cute. I want one so bad!!!