Helo and Boomer have both been scratching a lot with the Halo Spot Stew dry food. I made the mistake and switched to Merricks Cowboy Cookout which contains grains as well. They liked the food but they scratched even harder. I tried Grandma Lucy's Artisan, but they didn't want to eat it. My fault I did not introduce it to them slowly. I just made a small portion and wanted them to try it. I have Dr. Harvey's Veg-to-Bowl, but did not try it yet. I have to buy oil. I now have EVO. They both like it, but boy are they gassy! Is this normal? Is it because I am changing foods? Should I add something to the food that will help them digest, or do I need to keep on trying foods?