We are very happy with Nutro Natural Choice Lamb and Rice. Greyhounds tend to have loose stools, and Nutro is the best we've tried at combatting that problem. Also, our dogs don't carry that dog food smell on them, like they did when they were on Diamond Lamb and Rice and ProPlan Chicken and Rice. We also like that the Nutro food had extra linoeic (?) acid in it, which makes their coats very soft and shiny.
Our little dog, Pup, is on Nutro Max Weight Control, which is the only quality weight control food we could find which has glucosime and chondrontin in it - which is good for her hip dysplasia (that is also why she is on weight control food).