Contrary to popular belief, dogs and cats do not need variety in their diet. In fact, this can lead to intestinal problems. Using a good quality and nutritional balanced diet throughout the puppy stage will help maintain good health in the adult and older years of life. Switching brands abruptly can cause diarrhea. Any change must be done gradually and slowly.

        The use of table scraps can also lead to obesity and a  medical condition called "pancreatitis," which is life threatening. Avoid giving your puppy chocolate, bacon , raw onions, raisins or grapes can also be toxic.

        Most dogs and cats do not tolerate cow milk very well. It may cause diarrhea. Raw eggs can cause Salmonella infection in dogs as well as people. Never give bones of any kind to your dog since they have the potential to splinter, chip and can cause intestinal perforation or blockage which are serious conditions.

        Begging by the owner's table can be a very annoying habit that is easier to prevent than it is to cure. A dog that begs at the dinner table is not pleasant for most people. This leads to the stealing of food scraps and as a consequence, unhealthy weight gain, which can lead to medical problems in older dogs.