Freeze-Dried Beef Heart

Every beef carcass yields a heart, a working muscle that sells poorly at the meat counter. Freeze-drying makes it shelf-stable without cooking, which lets brands add a raw meat element to cooked kibble.^1,6,7,13

1. 01 // Source Beef hearts Heart muscle from cattle at slaughter. AAFCO counts heart as meat, alongside tongue and diaphragm, not as a by-product.
2. 02 // Process Frozen solid Raw heart goes into the freezer at about 77% water, the water the next step has to remove.
3. 03 // Process Vacuum dried Under vacuum, ice turns straight to vapor without melting, with the product held near minus 5°C. Nothing is cooked.
4. 04 // Output Porous dried heart Light, sponge-like raw pieces or powder that must be sealed from moisture and air, then coated on or mixed into kibble.

1. 01

   A raw selling point

   Brands bake or extrude the kibble first, then coat it or mix in freeze-dried raw pieces. The raw layer sells the bag as less processed to owners who want raw feeding.¹³

2. 02

   Lean protein without water

   Fresh heart is 77% water. Freeze-dried, it is about 77% protein and 17% fat on a dry basis, so each gram adds real muscle protein.¹

3. 03

   Meat flavor on the outside

   A coating puts meat where the dog's nose meets the kibble. One raw-coated brand sells its line on taste; no published trial has measured heart coatings for palatability.¹³

How much No source publishes how much heart a recipe holds. Labels list by weight, so heart sitting below the main meals is a small share.⁶

1. Brands say

   Freeze-dried heart is concentrated protein

   Evidence

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

   Plain arithmetic. Raw heart is 77% water and 17.7 g protein per 100 g, so dried it is about 77% protein. As a coating low in a list, though, it barely moves the bag's protein figure.¹

2. Brands say

   Beef heart is a natural CoQ10 source for heart health

   Outruns the evidence

   Evidence

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

   Heart is the richest beef tissue tested, 110 µg per g against 23 for muscle. Yet a 43-dog trial of 200 mg CoQ10 daily found no echocardiographic benefit, and matching that dose takes about 1.8 kg of fresh heart.^2,5

3. Brands say

   Heart supplies taurine that protects against DCM

   Outruns the evidence

   Evidence

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

   A feed survey found animal muscle high in taurine and plants low or empty. But dogs make their own from methionine and cysteine, FDA has not pinned down the cause of diet-linked DCM, and no study tests heart in kibble.^3,4

4. Owners say

   Freeze-drying makes raw meat safe

   Outruns the evidence

   Evidence

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

   Freeze-drying removes water below freezing and cooks nothing. A University of Guelph researcher calls it food preservation, not bacterial control, and a 112-product study flagged raw foods sold at room temperature as a considerable health risk.^8,9

5. Critics say

   Heart is a low-grade organ by-product

   Outruns the evidence

   Evidence

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

   AAFCO files heart muscle under meat, with skeletal muscle, tongue and diaphragm, not under by-products. At about 77% protein and 17% fat on a dry basis, its makeup is lean muscle.^1,6