Instruct: Classify Amazon reviews into positive or negative sentiment
Query: unbalanced

I was very excited to get a cook book that I could start making my own fresh dog food. But in speaking with my vet, I now understood what type of research goes into Dog Cookbooks. It was actually scary that really not much research has been done. In fact we may cook dog food, but it is not balanced. These books do not show that dogs need bone meal, or vitamins. The Dog food cooks books are more for human enjoyment than actual nutrition for our canine loves.