My girls grew up on Wellness, because I was satisfied with the quality of the ingredients (researched on a variety of review sites, including Whole Dog Journal's annual best foods report), they liked it, and they did well. We've had Cassie on I/D lowfat for a few years since she had pancreatitis, so I ended up putting Angel on I/D regular (Angel has no GI issues and it's not that I love the food, but I kind of wanted them on something similar). I transitioned their canned back to Wellness, but lately I've not been giving canned and am just mixing with yogurt. Cass has chronic inflammatory rhinitis and tends to choke on her food, and I think she actually does better with kibble mixed with yogurt rather than soft food. Angel really likes yogurt and I figured she could use the protein as she's on chemo for lymphoma.
They actually seem to do well with whatever I feed them. They have nice soft, shiny coats and good energy and no issues with itching or skin/ear infections.
Also a biscuit or two or three a day (Wellness/Old Mother Hubbard, Newman's Own, and the Hills treat for special diets (doubt those last ones are super tasty, but they are hard and crunchy to give them some chewing exercise - and no one complains)).
Also a small bite of cheddar cheese daily. Because, cheese.