Bests & Worsts Reviews from Amazon

We have used Diamond Naturals Grain free salmon over a year now and thought that it was fine. Dog liked it, no issues... until today. Our 7yr old Italian Greyhound had been acting lethargic and not himself. So we went to vet. Turns out his heart is grossly enlarged (should be 30% of cavity, is now at 70%) First question vet asked was what food he was on. When we should him The Diamond Naturals grain free, he explained that he and other vets have seen a large uptick in heart problems and heart enlargement cause by grain free foods and to switch immediately. We are really hoping this is reversible. I am not here to bash a company or make unsubstantiated claims. In fact, I am reading up on best dog foods and Diamond Naturals does have a grain version... so we may decide to go that route once we have him healthy again and vet oks it. I'm only writing this review specific to their grain free version to warn what can happen. do research and talk to your vet. It may be some breeds are more susceptible than others in this area.