Lots of people are diagnosed with allergies or have bad reactions to certain food ingredients which is why they choose to avoid them. (fitnessandpower.com)
Some dogs naturally dislike certain food ingredients but if the cause is a sensitive stomach it can be a symptom of a serious problem. (dogguidereviews.com)
Some of these pets do better when certain food ingredients are eliminated, some do better when the amount of fiber in their diet is lowered and some do better when the amount of fiber in their diet is increased. (2ndchance.info)