Has anyone tried this dog food? Tractor Supply carries it, there is no corn or soy in it and having a Boxer I need a no corn food. I bought a bag today and I am going to slowly mix it with the food he is barely tolerating right now(its making him SUPER gassy) Here is what the Tractor Supply website has on the food we bought: 4health Chicken & Rice Formula for Adult Dogs Dog Food is specifically formulated to provide your adult dog with the best nutrition available. The ideal levels of protein and fat support a healthy, lean body condition for longevity and vitality. Nutritional features like antioxidants, joint support, prebiotics and omega fatty acids all work together 4health. Vitamin E and Selenium protect healthy cells from free radicals Antioxidants keep the immune system strong Glucosamine and chondroitin support joint health by providing the building blocks of healthy joint fluid Omega?6 and Omega?3 Fatty Acids support healthy skin & coat and a strong immune system Dried chicory root (prebiotic) supports healthy digestion by providing energy to the cells and good bacteria in the digestive system 4health Formulas for puppies and dogs offer all of the nutritional features to keep your pet happy and healthy. With fresh meat in every formula, 4health offers exceptional taste and optimal protein nutrition. A blend of omega fatty acids promotes overall good health and a shiny, healthy coat. Antioxidants are guaranteed in each formula, assurance that your pet's immune system is getting the boost it needs. Compare 4health to leading national brands and you'll see why 4health is the best choice for your pet's health. Ingredients: Chicken, Chicken Meal, Cracked Pearled Barley, Millet, Brewers Rice, Chicken Fat (Preserved with Mixed Tocopherols), Beet Pulp, Natural Chicken Flavor, Flaxseed, Fish Meal, Potassium Chloride, Salt, Choline Chloride, Dried Chicory Root, Glucosamine Hydrochloride, Vitamin E Supplement, Iron Proteinate, Zinc Proteinate, Yucca Schidigera Extract, Copper Proteinate, Ferrous Sulfate, Zinc Sulfate, Copper Sulfate, Potassium Iodide, Thiamine Mononitrate, Manganese Proteinate, Manganous Oxide, Chondroitin Sulfate, Ascorbic Acid, Vitamin A Supplement, Biotin, Calcium Pantothenate, Manganese Sulfate, Sodium Selenite, Pyridoxine Hydrochloride (Vitamin B6), Vitamin B12 Supplement, Riboflavin, Vitamin D Supplement, Folic Acid. Guaranteed Analysis: Crude Protein 26.0% (min.), Crude Fat 15.0% (min.), Omega?6 Fatty Acids 2.5% (min.), Omega?3 Fatty Acids 0.4% (min.), Moisture 10.0% (max.), Crude Fiber 4.0% (max.), Glucosamine hydrochloride 300 mg/kg (min.), Zinc 150 mg/kg (min.), Chondroitin sulfate 100 mg/kg (min.), Selenium 0.4 mg/kg (min.), Vitamin E 150 IU/kg (min.). Caloric Content: 3,755 kcal/kg (351 kcal/cup).