Causes?

Intolerances frequently happen when a dog is sensitive to a certain food. Most of the time foods that contain grain, gluten, carbs, sugars, etc will cause an intolerance because their body is not meant to digest the food.

Treatment and Prevention?

When dogs eat foods filled with corn, wheat, soy, gluten and grain they tend to have a reaction in their digestive system (this we call a food intolerance). food intolerances are far more common than food allergies and can result in a reaction that takes place over a longer period of time.

Additional info?

Intolerances are different than allergies as allergies trigger the immune system and intolerance is mostly limited to the digestive tract.