Originally Posted by irishrose
ptquits is right. Corn is a definite allergen. There are dozens of foods available without corn if you look somewhere besides your grocery store. My dogs sometimes have food with grains. I like variety in their diet, but they get no corn, wheat, soy or menadione. They also get prey model raw every other day.
True diet could be the culprit, as your dog gets older in digesting.