"In the beginning, I was weary about Science Diet and its chicken by-product. So I slowly started my adopted cat on a premium, popular dry food. She ate less and less, and we realized we had to go back to what she was used to at the shelter -- Science Diet. We chose the Oral Care because she's had a history of gingivitis, and so far, she's been crunching her kibble, and at the last vet visit, there seemed to be less plaque. Yay! She's also nuts about this stuff...whining for more. Hopefully it's due to the flavor and not a lacking in nutrition. While there has been some negativity about the by-product, she's maintained a soft, healthy coat and an extremely healthy appetite. So I'm sticking with this."