Most dry dog food is made by extrusion: ingredients are mixed, pushed through a die at high pressure and temperature, and puffed into the familiar kibble shape. Cold-pressed food uses a different process, and the difference matters more than most packaging makes clear. Here is what actually changes between the two methods.

What extrusion does to protein

Extrusion typically runs at temperatures between 120 and 180 degrees Celsius. At those temperatures, some proteins denature and the Maillard reaction occurs, which browns the surface and creates new chemical compounds. The process is fast and efficient, and it produces a shelf-stable product. The trade-off is that heat-sensitive nutrients, including some B vitamins and certain enzymes, are partially degraded. Manufacturers compensate by adding synthetic vitamins after processing, which is why you see long vitamin lists on extruded food labels.

What cold-pressing does differently

Cold-pressing runs at much lower temperatures, typically below 45 degrees Celsius. The ingredients are compressed rather than cooked in the traditional sense. This preserves more of the natural protein structure and reduces the need for post-processing vitamin supplementation. The resulting pellet is denser and smaller than extruded kibble, and it absorbs moisture quickly, which is why cold-pressed food should not be left in a bowl with water added.

Does it make a practical difference for your dog?

The honest answer is: it depends on the dog. Some dogs with sensitive digestion do noticeably better on cold-pressed food, possibly because the lower-temperature processing leaves more intact digestive enzymes. Others show no difference at all. There is not yet a large body of peer-reviewed research comparing long-term health outcomes between the two formats. What we can say is that cold-pressed food tends to have shorter ingredient lists and fewer synthetic additives, which makes it easier to identify what your dog is actually eating.

What to look for on the label

Regardless of processing method, the first three ingredients tell you most of what you need to know. Named meat sources (chicken, salmon, lamb) should come before grains or vegetables by weight. By-products are not automatically bad, but unnamed by-products (listed as 'meat and animal derivatives') give you no information about what you're feeding. A good cold-pressed food will list its protein sources specifically and will not need to pad the ingredient list with caramel colouring or artificial preservatives.

A note on cost

Cold-pressed food is generally more expensive per kilogram than mid-range extruded kibble. Some of that is the process, some is the smaller production runs, and some is honest margin. It is not automatically better just because it costs more. We stock Northfield Cold-Pressed because we've read the ingredient list, visited the facility, and seen dogs do well on it. That is the only reason we stock anything.

If you want to talk through whether cold-pressed food makes sense for your dog specifically, come into the shop or book a short nutrition consultation. We'll give you a straight answer based on your dog's size, age, and any existing health considerations.