Vegetable Oil

Oil mills separate fat from edible oil crops by pressing or solvent extraction and sell the remaining solids as meal. The generic label term leaves the crop unnamed.^7,8

1. 01 // Source Seeds or fruit Edible oil crops supply oil-bearing seeds or fruit to processors.
2. 02 // Process Seeds prepared For seed oils, mills clean and crush or flake the crop to expose its oil.
3. 03 // Process Oil extracted A screw press or solvent line separates oil from the seed solids, which become meal.
4. 04 // Output Vegetable oil Oil reaches the kibble plant as a fat ingredient; the generic name does not disclose its crop.

1. 01

   Adds dietary energy

   Oil is almost entirely fat, with no protein in the canola example. It raises a recipe's energy without adding another starch or protein ingredient.⁶

2. 02

   Supplies fatty acids

   Dogs need dietary linoleic acid. Canola and sunflower oils supply different amounts, so the value of this ingredient depends on its undisclosed plant source and the finished recipe.^2,5

3. 03

   Coats dry kibble

   Manufacturers can spray oil onto dried kibble. Dogs preferred the sunflower-coated food to versions coated with poultry fat or beef tallow in one comparison.³

How much A dog trial supplemented food with 8.2 g of canola, flaxseed or camelina oil per 100 g of total intake; a typical recipe amount is not published.²

1. Brands say

   Vegetable oil adds concentrated calories

   Evidence

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

   This is arithmetic: canola oil averaged 99.7% crude fat on a dry matter basis. Oil raises dietary energy, although its place on the ingredient list does not reveal how much the food contains.^6,9

2. Brands say

   Vegetable oil supplies essential fatty acids

   Outruns the evidence

   Evidence

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

   Dogs need dietary linoleic acid. Published canola samples contain 173 to 249 g/kg and sunflower samples 609 to 736 g/kg. The generic name hides both the plant and its amount, so it cannot prove the finished food's supply.^2,5

3. Brands say

   Vegetable oil makes kibble taste better

   Outruns the evidence

   Evidence

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

   A 30-dog preference test compared kibble coated with 5% sunflower oil against versions coated with animal fats; sunflower drew 56% preference. It included no uncoated kibble, so it cannot show that adding vegetable oil improves taste.³

4. Brands say

   Vegetable oil gives dogs a shinier coat

   Outruns the evidence

   Evidence

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

   A 10-dog linoleic acid trial measured skin lipids and water loss, not shine. In a 30-dog oil comparison, shine rose from baseline across groups, but oils did not differ and there was no oil-free control.^1,2

5. Critics say

   Seed oils cause inflammation in dogs

   Outruns the evidence

   Evidence

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

   A 30-dog, 16-week comparison found no difference in measured inflammatory markers among camelina, canola and flaxseed oils. It lacked an oil-free group, so it cannot settle every dose, but it provides no support for the blanket warning.²