We, human beings, have over the course of time developed a digestive system that is capable of handling and digesting a wide variety of foods. As time passed by, we became increasingly more creative with our food, we created new foods, new combinations of food and new supplements to enhance the experience and pleasure of eating. However not all our foods are good to our dogs and because of this there are some foods you should not feed your dog, since they will cause him harm.
The majority of dogs love food and are specially attracted to what they see people eat, and although sharing a small bit of your food with them is fine and kinda nice, you should take caution of which foods you should not feed your dog.