What about meat?

Firstly, dogs are omnivores, not carnivores. Hence, as is the case with humans, it is not necessary for dogs to eat meat. Remember, there is nothing magical about meat. Meat contains high amounts of proteins, amino acids, iron and B-vitamins, among other things, which can be derived entirely from plant-based sources. Therefore, as this book will teach you, with proper feeding and supplementation, adequate nutrition is 100% attainable through a vegetarian diet. In fact, a vegetarian diet may help avoid suffering and the many potentially detrimental health effects (e.g., diseases, cancer, etc.) of consistent exposure to commercial meat-based food products. This is to due to chemicals, hormones, antibiotics, improper nutrition, herbicides, and other toxins farm animals are commonly exposed to on a daily basis. As mentioned, changes in temperament can be correlated with the increase of norepinephrine. Dr. Judith J. Wurtman of MIT notes: "Carbohydrate foods are relaxing, reducing stress and anxiety...Lean meat, in contrast, is one of the foods that stimulates brain chemicals such as Dopamine and norepinephrine, which have log been linked to the fright, flight, or fight reactions..."