Oat Fiber

It creates a feeling of fullness while adding almost no nutritional value.

Oat fiber is an insoluble fiber made from the outer hull of the oat grain. It adds bulk to stool and has almost no other nutritional value. Tufts veterinary nutritionists explain that insoluble fibers enter and exit the body virtually unchanged. It is usually listed in small amounts. For a cat with a digestive or other medical condition, ask your veterinarian.

Source: sites.tufts.edu

Oat fiber is the ground hull of the oat grain, the tough outer layer removed before oats are eaten. It is almost all insoluble fiber, with very little starch or protein. Manufacturers use it to add bulk and keep bowel movements regular, and it appears mostly in weight-control recipes. It contributes fiber and almost nothing else to the food.

No. Oat fiber is made from the oat hull and is almost all insoluble fiber. Oatmeal is the rolled grain, which is mostly starch. Oat bran is the outer layer of the grain under the hull and contains soluble fiber. Tufts veterinary nutritionists list oat bran among fibers that are a mixture of soluble and insoluble types.

Source: sites.tufts.edu

Oats do not contain wheat gluten, though they can pick up traces from shared farm and mill equipment. For cats the question matters less than it does for people, since gluten intolerance has not been shown in cats. Oat fiber is mostly hull material and carries very little protein of any kind, so it adds almost no gluten-type protein to a food.

Pettings gives oat fiber 2 out of 5 and lists it as a processed fiber. It appears on 4 of the 149 dry cat foods we list. It adds bulk and fullness but has almost no nutritional value. Each food's page shows how it scores overall.