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Nutrition12 min readBy Fortis Pet Nutrition Team

Best Grain Free Dog Food UK

A complete guide to grain free dog food - what to look for, what to avoid, and how cold pressing makes all the difference.

Most of us check the back of our own food before buying it. We look at the ingredients, avoid things we cannot pronounce, and put it back if something does not look right.

Your dog deserves the same.

Grain free dog food has become more popular for good reason. But not all grain free food is the same. Some brands just swap grains for cheap starches and still cook everything at extreme heat.

This guide covers what to look for, what to avoid, and how to pick food that actually works for your dog.

What Is Cold Pressed Dog Food?

Cold pressed dog food is made differently to normal kibble. Standard kibble is cooked at temperatures above 140°C — that level of heat breaks down proteins and destroys vitamins.

Cold pressing uses much lower temperatures. The ingredients are mixed and pressed together under high pressure instead of being blasted with heat. This keeps far more of the natural nutrition locked in.

The result is a denser pellet that behaves differently in your dog's stomach:

FeatureStandard KibbleCold Pressed
Cooking TemperatureAbove 140°CLow temperature
In the StomachSwells and expandsDissolves and crumbles
NutrientsOften added back after cookingNaturally preserved
TextureHard and crunchyDenser and softer

Dogs evolved eating raw food, not heat-blasted pellets. Their digestive systems work best when food breaks down gradually. Cold pressed food works with that biology instead of against it.

Happy dog with Fortis Pet food

Digestion and Gut Health

Because cold pressed food crumbles instead of swelling, it moves through the stomach and intestines at a better pace. More nutrients get absorbed.

Standard kibble often expands in the stomach, which can lead to discomfort, bloating, and in some breeds, more serious gastric problems.

Many owners notice firmer, smaller stools after switching. This is a good sign — less waste means the body is using more of what goes in.

Dogs with sensitive stomachs or loose stools often improve within a few weeks.

Skin, Coat and Joint Support

Essential fatty acids like omega-3 and omega-6 are easily damaged by heat. Cold pressing keeps them intact.

Dogs on cold pressed diets often develop shinier, softer coats within a couple of months. Dry or flaky skin tends to clear up as the body gets the fatty acids it needs.

Joint health benefits come from the natural compounds in quality protein sources. Cartilage and connective tissue retain more of their useful properties when not overcooked.

Why Breed Matters

Different breeds have different needs:

Large Breeds

German Shepherds, Labradors need joint support and controlled growth rate.

Small Breeds

Chihuahuas, Yorkies have faster metabolisms. The softer texture suits smaller mouths.

Working Breeds

Spaniels, Collies need calorie-dense food for sustained energy without blood sugar spikes.

Flat-Faced Breeds

Bulldogs, Pugs, Frenchies benefit from food that doesn't swell in the stomach.

Sensitive Dogs

Some dogs are sensitive to grains without having a full allergy. Low-level inflammation can show up as:

  • Itchy skin
  • Ear infections
  • Upset stomach

Removing grains often leads to visible improvements within four to six weeks.

Important: Look for food where protein comes first on the ingredient list, not legumes or starches.

What to Avoid

The ingredient list tells you everything. Watch out for:

  • "Meat and animal derivatives" — a catch-all term that could mean anything
  • Artificial colours — they exist for marketing, not nutrition
  • Too many carbohydrates — protein should be the main ingredient
  • Added sugars — molasses or corn syrup have no place in dog food

What to Look For

  • Named protein sources at the top — chicken, lamb, fish, or duck
  • Quality carbs — sweet potato provides natural fibre and vitamins
  • Good fats — salmon oil for omega-3, avoid generic "animal fat"
  • Functional extras — glucosamine for joints, chicory root for gut health

Our Recommendation

The best grain free dog food combines quality ingredients with gentle processing.

British-made food is worth looking at. UK manufacturing standards are high, and FEDIAF compliance means the food meets European nutritional standards.

At fortispet.co.uk, the approach is simple: real ingredients you can recognise, made in Yorkshire. No obscure derivatives. No artificial colours. When you read the back of the bag, you should see things you'd find in your own kitchen.

Feeding Guide

Switching food takes patience. A sudden change can upset any dog's stomach.

The 7-10 Day Transition:

  • Days 1-3: 25% new food, 75% old food
  • Days 4-6: 50% new food, 50% old food
  • Days 7-9: 75% new food, 25% old food
  • Day 10: 100% new food

How much to feed depends on weight, age, and activity level. Check your dog's body shape — you should be able to feel their ribs without pressing hard.

Always make sure fresh water is available. Some owners add warm water to bring out the smell for fussy eaters.

Have more questions?

Visit our FAQ page →

Ready to make the switch?

Try Fortis Pet cold-pressed nutrition for your dog.

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