Our veterinarian said that our bullies were getting to fat and that we should put them on Hill's Science Diet Perfect Weight. I noticed that the food did not have what I thought was enough protein for my bullies. I mentioned this to the vet and she said that there was enough protein and that my dogs would be fine. Fast forward 3 or 4 months I started to notice that Odin was becoming lethargic and his fur was lackluster. He was also getting bald spots. I took him to the vet and she said oh, this happens to some dogs, he was given a good bill of health by the vet. Well he wasn't fine to me. I decided last month to put him back on Merrick's and I gave him an egg with every other breakfast and some pills that have salmon oil in them (I am still giving him eggs and the pills). Believe it or not after 3 weeks his fur looks shiny, he has more energy and the bald patches are filling in. I had taken all three of my bullies off of Merrick's last year per the vets instructions and was feeding them Kirkland brand food . What a big mistake. Trini and Beau did not have as bad of reaction to the Science Diet food however their fur is now shiny and they look a lot healthier and starting to slim out. This is just my experience with dog food and I am not being paid to tout Merrick's food. I hope that this helps others.