Natural foods however increase salivation which in turn increases the release of antibacterial agents in the saliva which assists in keeping teeth clean. Unfortunately, many of the products used by the pet food manufacturers already have the preservatives in them prior to receiving them. It is common to use Ethoxyquin in many meal products and digests. Some dogs may have softer stools until their bodies adjust to the raw diet. If your dog has been on antibiotics for a period of time you may want to add live culture yogurt to help rebuild the beneficial bacteria population in the lower intestinal tract.
Some dogs show an increased volume of excretion, while others show a decrease.
Again, it will depend on the type of food the dog was on previously. For example some kibble foods are made especially to reduce fecal volume, therefore, in comparison a natural diet may seem to increase the fecal volume. Sometimes an animal will reverse this habit after switching to a natural diet but this is not always the case.