Wellness Super 5 has grains in it. Taste of the Wild is grain free. It's up to you if you want to go grain free or not. Many dogs have allergies to grains. Some do fine on them. Wellness also has Wellness Core which is grain free.
Here's the ingredients in both ....
Wellness Super 5: 22% protein, 12% fat (Gets 4/5 stars on dogfoodadvisor.com)
Deboned Chicken, Chicken Meal, Oatmeal, Ground Barley, Ground Brown Rice, Tomato Pomace, Rye Flour, Canola Oil (preserved with mixed tocopherols, a natural source of Vitamin E), Tomatoes, Rice Bran, Deboned Whitefish, Natural Chicken Flavor, Carrots, Spinach, Sweet Potatoes, Apples, Blueberries, Ground Flaxseed, Ground Millet, Dicalcium Phosphate, Calcium Carbonate, Potassium Chloride, Minerals [Zinc Sulfate, Zinc Proteinate, Iron Proteinate, Ferrous Sulfate, Copper Proteinate, Copper Sulfate, Manganese Proteinate, Manganese Sulfate, Sodium Selenite], Vitamins [Beta-Carotene, Vitamin E Supplement, Ascorbic Acid (Vitamin C), Vitamin A Supplement, Niacin, Calcium Pantothenate, Riboflavin, Vitamin D-3 Supplement, Pyridoxine Hydrochloride, Thiamine Mononitrate, Folic Acid, Biotin, Vitamin B-12 Supplement], Choline Chloride, Taurine, Mixed Tocopherols (a natural preservative), Glucosamine Hydrochloride, Chondroitin Sulfate, Chicory Root Extract, Garlic, Yucca Schidigera Extract, Green Tea Extract, Dried Lactobacillus plantarum, Enterococcus faecium, Lactobacillus casei, Lactobacillus acidophilus fermentation products.
Taste of the Wild High Prairie Formula: 32% protein, 18% fat (gets 5/5 on dogfoodadvisor.com)
Bison, venison, lamb meal, chicken meal, egg product, sweet potatoes, peas, potatoes, canola oil, roasted bison, roasted venison, natural flavor, tomato pomace, ocean fish meal, salt, choline chloride, dried chicory root, tomatoes, blueberries, raspberries, yucca schidigera extract, dried fermentation products of Enterococcus faecium, Lactobacillus acidophilus, Lactobacillus casei and Lactobacillus plantarum, dried Trichoderma longibrachiatum fermentation extract, vitamin E supplement, iron proteinate, zinc proteinate, copper proteinate, ferrous sulfate, zinc sulfate, copper sulfate, potassium iodide, thiamine mononitrate (vitamin B1), manganese proteinate, manganous oxide, ascorbic acid, vitamin A supplement, biotin, calcium pantothenate, manganese sulfate, sodium selenite, pyridoxine hydrochloride (vitamin B6), vitamin B12 supplement, riboflavin (vitamin B2), vitamin D supplement, folic acid.
"Having heard all of this, you may choose to look the other way.....
but you can never say again that you did not know." William Wilberforce 1759-1833