Corn Meal

Feed mills grind dried field corn to make corn meal. The whole kernel stays together, including its bran and germ. Manufacturers buy the ground grain as a widely supplied source of starch for kibble.^5,6

1. 01 // Source Dried field corn Dry kernels arrive with their bran, germ and starchy center still together.
2. 02 // Process Ground whole The mill grinds the kernels without separating the starch from the bran and germ.
3. 03 // Output Corn meal The ground grain arrives at the kibble plant ready to mix with the other ingredients.

1. 01

   Supplies digestible energy

   Cooking makes corn starch accessible to digestive enzymes. Dogs digested starch well in tested corn diets, though a whole diet's digestibility does not measure corn meal alone.^1,2,3

2. 02

   Helps form kibble

   Starch expands and binds during processing. Corn meal supplies that starch, helping the cooked mixture become pieces that hold together.^2,3

3. 03

   Supplies starch at scale

   Field corn is a major feed grain. Its broad supply gives manufacturers a practical starch source for recipes that obtain most of their protein elsewhere.⁵

How much A 12-dog trial tested foods formulated with 56.2% corn on a dry matter basis; that study formula is not a typical amount.³

1. Brands say

   Cooked corn meal gives dogs digestible energy

   Evidence

   1. Strong
   2. Some
   3. Thin
   4. None

   Six of 36 dogs ate a corn diet in one trial, where starch digestibility exceeded 98%. A separate 12-dog trial found extruded corn food had greater digestibility than baked or pelleted versions. Both measured whole diets, not corn meal alone, and the groups were small.^1,3

2. Critics say

   Corn meal causes a dangerous blood sugar spike

   Outruns the evidence

   Evidence

   1. Strong
   2. Some
   3. Thin
   4. None

   A 36-dog trial found corn, rice and cassava diets gave larger glucose and insulin rises in the first 30 minutes than pea or lentil diets. The dogs were healthy and no harm was measured. The cited trial did not test whether that rise is dangerous.¹

3. Brands say

   Linoleic acid in corn meal improves skin

   Outruns the evidence

   Evidence

   1. Strong
   2. Some
   3. Thin
   4. None

   Whole corn averaged 4.3% fat on a dry basis, and its oil contains linoleic acid. The cited dog feeding studies measured digestion, stool or glucose responses, not skin or coat outcomes. No cited source shows a skin benefit from corn meal.^1,2,3,5

4. Owners say

   Corn is a common dog food allergen

   Outruns the evidence

   Evidence

   1. Strong
   2. Some
   3. Thin
   4. None

   A review found corn reactions in 13 of 297 dogs with documented food reactions, fewer than reactions to beef or chicken. Selected cases cannot measure risk in all dogs, but they do not support routine avoidance.⁴

5. Critics say

   Corn meal is useless filler

   Outruns the evidence

   Evidence

   1. Strong
   2. Some
   3. Thin
   4. None

   Whole corn averages about 73% starch on a dry basis. In a 12-dog trial, extruded corn food supplied digestible energy and produced acceptable stools. Calling the ingredient useless ignores those jobs.^3,5