Your dog doesn't need to drink orange juice. There are evolutionary and biochemical reasons why humans need to consume vitamin C but dogs -- and many other animals -- do not.
biochemistry
A couple of years ago Panera Bread went crazy. Those high up in the corporation decided that selling really great tasting food was no longer a sufficient strategy. No, they reasoned, if Panera Bread wanted continued success it needed to go on a full-frontal assault against science.
Synthetic cannabinoids are sometimes mixed with rat poison, which causes uncontrollable bleeding. So, as it turns out, the neighborhood drug dealer might not be a completely trustworthy individual.