It has corn gluten in it but corn gluten is usually much less allergenic than corn.
Actually - not really.
Gluten is a protein substance, and cats can have the same kind of intolerance to it as people who suffer from celiac disease.
When a person with celiac disease consumes gluten, damage to the small intestine results. The body responds to gluten as if it were an antigen and launches an immune-system attack when it is absorbed by the intestine. This in turn causes the lining of the small intestine to swell. As a result, tiny hairlike projections called villi suffer desctruction, which impairs the body's ability to absorb vital nutrients. Malabsorption becomes a serious problem, and the loss of vitamins, minerals, and calories results in malabsorption despite an adequate diet. Diarrhea compouds the problem. Because celiac disease impairs digestion, food allergies may also appear.
Celiac disease affects both adults and children, and it can appear at any age. It often appears when a child is first introduced to cereal foods.
The same thing happens in kittens, they can show serious signs of intestinal disease as soon as they are put on foods containg grains after being weaned.
In cats the malabsorption caused by gluten can become life-threatening and irreversible if it is not treated with medication and diet in time.
(I saw one cat die of this and her weight at the time she died was down at 3 pounds. At one time this same cat had a normal healthy weight around 8 pounds.)
So, gluten can
cause problems in individuals who have an intolerance to it. Loose stools or diarrhea are warning signs that something is wrong. The problem should be dealt with as soon as it is discovered. The warning signs should never ever be ignored.