After the extensive commercial dog food contamination incidents, it is worth it to know what your dog is eating. By baking or purchasing homemade dog treats, dog owners have more control and options about what to feed their pets and what is actually going into their dog’s snacks. Homemade treats can and should be prepared chemical free. Chemicals and preservatives found in commercialized dog treats can actually harm dogs according to research and according to many researchers, the chemicals found in many commercial treats, snacks and food products, impede good behavior, due to the way the chemicals interact with a dog’s delicate brain. In some studies, researchers have also found that chemicals contained in commercialized dog snacks can even cause aggressive behavior.