Protein for Dogs: The Complete Guide

Nutrition · Protein

How much protein your dog really needs, how to compare foods, which sources suit sensitive dogs, and the kidney myth that won't go away.

By SPLOOT Grooming, Aarhus · 10 min read

Protein is the nutrient that builds your dog's muscles, skin, coat and immune system. It is also the one owners are most confused about. How much is enough? Is chicken bad? Will too much meat hurt the kidneys? Are insects and mussels the future?

This guide answers all of it in one place. It is written for owners of curly and wavy coats, such as Cavapoos, Cockapoos and other doodles, but the science applies to every dog.

What protein does in your dog's body

Dogs don't actually need protein as such. They need the amino acids protein is made of. The body breaks food protein down into amino acids, then rebuilds them into whatever it needs.

Ten of those amino acids are essential, because dogs cannot make them: arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan and valine. A food can be high in protein and still short on one of these. That is why quality matters as much as quantity.

What those amino acids build:

• Muscle: strength, mobility and healthy ageing
• Skin and coat: hair is made mostly of the protein keratin
• Immune system: antibodies are proteins
• Enzymes and hormones: digestion, metabolism and growth
• Repair: wound healing and recovery after illness

How much protein does a dog need?

In Europe, the benchmark is the FEDIAF Nutritional Guidelines, the standard any food labelled "complete" must meet. Minimums are given per 100 g of dry matter, meaning the food with all water removed.

Sources: FEDIAF 2024 summary, Animals (2021), Table 1.

Why is the minimum higher for less active dogs? They eat fewer calories, so each bite has to carry more protein to reach the same daily amount. Most small companion dogs, including many Cavapoos, sit closer to this group.

These are minimums, not targets. Most good-quality foods sit well above them. Puppies need more for growth, and healthy senior dogs often need as much or more, not less, to hold on to muscle.

How to compare two foods

The percentage on the label is "as fed", water included. To compare wet and dry food fairly, convert to dry matter:

Protein on dry matter = label protein % ÷ (100 − moisture %) × 100

A kibble with 25% protein and 10% moisture has 27.8% protein on dry matter. A wet food with 9% protein and 80% moisture has 45%. The wet food is actually far higher in protein.

Protein quality: not all grams are equal

Two foods with the same protein percentage can feed your dog very differently. Three things decide quality.

1Digestibility

How much your dog actually absorbs. Muscle meat, eggs and fish are highly digestible. Some by-products count as protein on a label but are absorbed poorly.

2Amino acid profile

Whether all ten essential amino acids are present in the right amounts. Animal proteins usually cover them on their own. Plant proteins often need to be combined.

3Source transparency

A named source, such as "duck" or "dried salmon", beats a vague one, such as "meat and animal derivatives". If you can't tell what the protein is, you can't manage an allergy around it.

The protein percentage tells you how much. The ingredient list tells you how good.

Protein sources compared

There is no single best protein for dogs. The right one depends on your dog's tolerance, your budget and your values.

Sustainability is now part of the protein question. Insects and farmed mussels need far less land and water than beef. For owners who want a lower-footprint dog, they are the most interesting options on this list.

From our shelf: for a change of protein, try Buddy Tasty Duck Bites for small breeds, Buddy Free-Range Duck or Buddy Wild Venison. For marine protein, Vitbit Tornadogs Mini is a single-ingredient cod skin chew sized for small dogs.

Protein and food allergies

When a dog has a true food allergy, the trigger is almost always a protein, usually a meat or dairy rather than grain. A 2016 review of 297 food-allergic dogs found the most common culprits were beef (34%), dairy (17%), chicken (15%), wheat (13%) and lamb (5%).

These top the list because they are the proteins dogs eat most, not because they are inherently bad. Exposure drives allergy.

Signs to watch for: itchy paws, ears and belly, recurring ear infections, constant licking and soft stools. Floppy-eared doodles are already prone to ear problems, so a vet can help separate food allergy from environmental allergy.

How allergies are managed

1. Elimination diet. Around eight weeks on one protein your dog has never eaten, then old foods are reintroduced one at a time.
2. Hydrolysed protein diet. A vet diet where the protein is broken into pieces too small for the immune system to recognise.
3. Single-protein treats. Treats and table scraps are a common reason elimination trials fail. Match every treat to the diet.

From our shelf: single-ingredient treats such as Vitbit Hearts (100% cod) and freeze-dried duck cubes make it easy to reward without breaking the diet. Buddy soft ostrich treats are a novel option for dogs that react to common meats.

Myth: too much protein damages the kidneys

For a healthy dog, high protein does not cause kidney disease. The belief traces back to rat studies, and to the fact that dogs with advanced kidney failure are put on low-protein diets. The treatment was mistaken for the cause.

Dog studies don't support it. In a long-term study, dogs with 75% of their kidney tissue removed were fed high-protein diets without faster decline (Bovee et al., Kidney International, 1986). Veterinary nutritionists at Tufts note that restricting protein in healthy older dogs can even contribute to muscle loss.

What we see in the salon

Cavapoos, Cockapoos and other doodles grow hair continuously, much like a Poodle. Every strand is built from protein, so a coat that never stops growing is a constant protein demand.

On the grooming table, a dull, brittle or slow-recovering coat is often the first visible sign a diet isn't working. Coat health isn't only nutrition. Brushing, products and grooming frequency matter just as much. But you can't groom your way out of a poor diet.

For a healthy curly coat, look for:

• A high-quality, digestible animal protein as the base
• Omega-3 fatty acids from fish or marine sources, for skin and shine
• Consistency: coat changes take four to six weeks or more to show, so give any new food time

Omega-3 is the nutrient with the most evidence for skin and coat. The Smart Omega, CORE Reward+ Skin & Coat salmon treats and Green-Lipped Mussel Powder are easy ways to add it. Wondering about collagen? Read our guide to choosing the right collagen treats.

How to choose the right protein

1. Check the life stage. Puppy, adult or senior: match the food to the dog. Growing pups need a puppy formula such as Buddy Puppy Turkey & Salmon.
2. Read the first two ingredients. A named animal protein should lead.
3. Compare on dry matter, not the label percentage.
4. Know your dog's history. If they have eaten chicken for years and itch, try a protein they have never had.
5. Match treats to meals. Same protein, or a single novel one, keeps the diet clean.
6. Switch slowly. Mix old and new food over 7 to 10 days to avoid an upset stomach.

This guide summarises published veterinary research and European nutrition guidelines. It does not replace advice from your vet. If your dog has a diagnosed condition, speak to your vet before changing diet.

Frequently asked questions