Whole Grain Brown Rice

Rice mills dry harvested rough rice and remove its hull to produce brown rice. Brown rice is a milling product, not a leftover. Further polishing removes the bran to make white rice.^1,9

1. 01 // Source Rough rice Harvested rice reaches the mill enclosed in a hard outer hull.
2. 02 // Process Dried for milling Drying prepares the harvested grain for storage and milling.
3. 03 // Process Hull removed The first milling stage takes off the hull and leaves the bran layer on the rice.
4. 04 // Output Brown rice The grain reaches the food maker with its bran and germ retained; it may be ground before mixing.

1. 01

   Supplies digestible energy

   Cooking makes rice starch available to dogs. In a small feeding study, the brown rice diet's carbohydrate fraction was highly digestible.^1,7

2. 02

   Helps form kibble

   Manufacturers grind rice and cook its starch with the rest of the mix. Starch helps the finished pieces expand and hold together.¹

3. 03

   Large, steady supply

   Rice moves through large milling and pet food supply chains, making it a practical starch source. The industry report combines rice types, so it gives no separate brown rice amount.^9,11

How much Controlled dog trials fed brown rice at 15 and 30% of the diet, and at about 38% as fed in another; these are tested amounts, not typical recipes.^1,2

1. Brands say

   Brown rice gives dogs usable energy

   Evidence

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

   In an 8-dog comparison, the brown rice diet had 91.61% dry matter digestibility and 95.56% digestibility of its estimated carbohydrate fraction. A separate 6-dog trial found no pronounced digestibility loss at 30% brown rice.^1,2

2. Brands say

   Brown rice has more fiber than white rice

   Evidence

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

   Feedipedia reports average crude fiber of 2.0% of dry matter for brown rice and 0.4% for polished rice. The difference is real, but brown rice remains chiefly starch, not a concentrated fiber ingredient.^7,8

3. Brands say

   Brown rice feeds beneficial gut bacteria

   Outruns the evidence

   Evidence

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

   A 12-dog trial fed biscuits containing brown rice, wheat and oats. The higher resistant starch dose did not change measured fecal bacteria or fermentation products. Because the grains were combined, the trial cannot isolate brown rice.³

4. Brands say

   Brown rice releases energy more slowly

   Outruns the evidence

   Evidence

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

   An 11-dog comparison of commercial whole grain and other kibbles found no significant glucose differences. It did not isolate brown rice. The direct 8-dog brown versus white rice study measured digestion, not blood glucose.^1,5

5. Owners say

   Brown rice in kibble poisons dogs with arsenic

   Outruns the evidence

   Evidence

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

   In a small observational study, 7 dogs eating rice-based food had higher hair inorganic arsenic than 9 dogs eating no rice. It measured exposure, not illness, and did not isolate brown rice. Supplier testing matters more than a poisoning claim.^4,6