Whole Oat Groats

Oat mills remove the tough hull so the kernel is usable in food and feed. The groat is the main product of that step, not a milling leftover. Heating slows fat spoilage.^7,8

1. 01 // Source Harvested oats The harvested grain reaches the mill with a tough hull around the edible kernel.
2. 02 // Process Clean and dehull The mill removes debris and separates the lighter hulls from the intact kernels.
3. 03 // Process Heat to stabilize Heating slows the enzymes that would otherwise make exposed oat fat turn rancid.
4. 04 // Output Whole oat groats The dehulled kernels retain their bran and germ and may be ground before kibble is cooked.

1. 01

   Supplies cooked starch

   Groats bring starch that dogs digest after cooking. Cereal starch also helps dry food form during processing, making grain a practical energy source for kibble.^1,6

2. 02

   Adds fermentable fiber

   Oat fiber gives gut bacteria material to ferment. A groat diet raised fecal fermentation products against rice in one small dog study, without showing a health benefit.²

3. 03

   Provides inexpensive energy

   Cereals are generally an inexpensive energy source for kibble makers. Groats contribute some protein and fat too, but starch is their main contribution.^1,6

4. 04

   Keeps the kernel intact

   Removing the hull while retaining the bran and germ gives manufacturers a whole oat ingredient, distinct from the separated hulls used as fiber.^7,8

How much Dog studies tested diets with 30% and 40% groats. Those amounts are not a published industry norm.^1,2

1. Brands say

   Dogs digest oat groats well

   Evidence

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

   A 12-dog cereal comparison found groats supplied digestible energy. In a separate 10-dog trial, a complete diet with 40% groats was well digested. Processing and the rest of the recipe still matter.^1,2

2. Brands say

   Oat fiber improves gut health

   Outruns the evidence

   Evidence

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

   In a 10-dog trial, groats raised fecal propionate and butyrate against rice. A separate 18-dog comparison of whole grains found rye had a stronger effect on fecal microbes than oats. Neither trial showed better health.^2,3

3. Brands say

   Oat groats lower a dog's cholesterol

   Outruns the evidence

   Evidence

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

   A 14-dog trial found lower cholesterol with isolated oat beta-glucan added at 1%. An 18-dog trial feeding ground rolled oats found no cholesterol difference against other whole grains. A cholesterol benefit from groats is unproven.^4,5

4. Brands say

   Oats keep a dog's blood sugar low

   Outruns the evidence

   Evidence

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

   A 10-dog groat trial found no glucose or insulin advantage over other grains. In an 18-dog trial, a ground rolled oat diet produced a higher glucose response than wheat. Groats are not proven glucose control.^2,4

5. Critics say

   Oat groats are just filler

   Outruns the evidence

   Evidence

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

   Dehulled oats average about 61% starch on a dry matter basis. In a 12-dog comparison, cooked groats supplied digestible energy and protein. Calling them filler ignores those contributions, though they do not replace the main protein source.^1,6