dog chewing a natural collagen-rich cod skin chew

September 30, 2026

collagen for dogs: what it does, what the research says, and the best natural sources

Collagen has gone from the human supplement aisle straight into the pet aisle – powders, liquids, soft chews, collagen sticks. If you've been wondering whether your dog actually needs it, what it does, and where it naturally comes from, you're not alone. Here's what the research says, what it doesn't, and why the right chew can be one of the simplest ways to put collagen in your dog's routine.

What Is Collagen, and Why Does It Matter for Dogs?

Collagen is the main structural protein in a dog's body – the framework behind skin, tendons, ligaments, cartilage, and bone. It's what gives connective tissue its strength and stretch.

There are several types, and each one lives in a different place:

Type I – the most abundant, found in skin, tendons, ligaments, and bone
Type II – the main collagen in cartilage, including the cartilage that cushions joints
Type III – found in skin, muscles, and blood vessels

Collagen also carries a signature amino acid called hydroxyproline. It shows up almost exclusively in collagen, which is why scientists measure it to gauge how collagen-rich a tissue is. When you see a chew described as "high in hydroxyproline," that's another way of saying it's high in collagen.

graphic showing the three main types of collagen in dogs – Type I in skin, tendons, ligaments and bone, Type II in joint cartilage, Type III in skin, muscles and blood vessels

Is Collagen Good for Dogs? What the Research Says

This is the question most dog owners are asking – and the honest answer is encouraging, with a few important caveats.

How dogs use it. Dogs don't absorb collagen whole. It's digested and absorbed mainly as amino acids and small peptides, which then travel through the body – including to the joints. In other words, collagen gives your dog's body the raw materials it uses to maintain its own connective tissue.

Joints and mobility. This is where the dog research is strongest. In a placebo-controlled study of 31 dogs with osteoarthritis, three months of specific collagen peptides produced measurable improvements in gait. A separate randomized study of 60 dogs found that undenatured Type II collagen (often sold as UC-II) improved mobility to a similar degree as a common veterinary anti-inflammatory over 30 days.

Itchy skin and allergies. This is one of the most searched collagen topics – and the one with the least dog-specific research. Collagen is a key part of healthy skin, and a recent placebo-controlled trial in adults with atopic dermatitis found collagen peptides supported the skin barrier and brought faster relief from itching. But no comparable trial has been published in dogs yet. If your dog is itchy, the first step is always your vet – itching has many possible causes. Where single-ingredient chews genuinely help is on the diet side: they make it easy to avoid ingredients your dog reacts to and to rotate in novel proteins like duck, pork, or fish.

Is collagen safe for dogs? Collagen is protein, and dogs digest it like any other protein. As with any new chew, introduce it gradually – rich chews can upset sensitive stomachs, and higher-fat chews like pig ears aren't a fit for dogs with pancreatitis or on vet-prescribed low-fat diets.

The Most Collagen-Rich Parts of an Animal

If you're wondering what foods have collagen for dogs, the rule is simple: the more connective tissue and the less plain muscle a part contains, the more collagen it carries. Some of the richest natural sources:

The inner layer of beef hide – what collagen sticks are made from. It's essentially pure Type I collagen, which makes it the most concentrated whole-food source on the market.
Tendons – structurally made of collagen.
Chicken feet – mostly skin, tendon, and cartilage; roughly 70% of their protein is collagen.
Beef trachea – almost pure cartilage.
Fish skin – a dense source of Type I collagen.
Cartilage-rich cuts – ears, snouts, and necks, which pair Type II collagen with naturally occurring glucosamine and chondroitin.
Bone broth – slow-simmered bones and connective tissue release collagen as gelatin.

Beef hide and tendons win on sheer collagen concentration. Cartilage-based chews bring something different: collagen plus the rest of the joint matrix, all in one ingredient.

dog with hairy pig ear chew high in collagen

Collagen Chews vs. Collagen Supplements

Liquid collagen, powders, and joint soft chews are everywhere – so where do natural chews fit?

Supplements deliver a measured, standardized dose, and that's what the clinical studies above tested. Undenatured Type II collagen in particular works in very small, specific amounts. If your dog has diagnosed arthritis or joint disease, a vet-recommended supplement is the right tool.

Whole-food chews deliver collagen the way nature packages it – inside real cartilage, skin, and connective tissue – along with the benefits a supplement can't: long-lasting chewing, mental enrichment, and the natural scraping action that helps keep teeth clean. What they don't come with is a standardized dose, and we haven't found a study that has tested whether a whole chew delivers the same results as a clinical supplement.

The bottom line: chews are a simple, natural way to add collagen to your dog's routine. They're not a replacement for a vet-recommended joint supplement – but they're a great partner to one.

Collagen Sticks vs. Rawhide vs. Bully Sticks

All three show up in the same aisle, and they're often confused.

Rawhide is made from the outer layer of the hide, typically processed through the leather industry, and it doesn't break down reliably in the digestive tract.
Collagen sticks come from the soft inner layer of the hide, which is why they're considered more digestible than rawhide and marketed as the collagen play.
Bully sticks are beef pizzle – a high-protein, single-ingredient chew, but not a collagen-focused one.

If collagen is your goal, cartilage- and skin-based chews like the ones below give you a natural, single-ingredient option beyond beef.

Momentum's Collagen-Rich Chews

Every Momentum chew is a single ingredient – the whole animal part, nothing else – and our freeze-dried chews are processed at low temperatures to keep that raw structure intact. For a closer look at every chew we make, see our complete guide to freeze-dried dog chews.

natural collagen-rich dog chews including pig ears, pig snouts, poultry necks and fish skin chews

Pig Ears (Hairy and Clean) – Wisconsin pork
A pig ear is made almost entirely of cartilage, and lab analysis of pig ear cartilage found that collagen makes up the majority of the tissue, alongside Type II collagen, chondroitin, and hyaluronic acid. Hair or no hair, the collagen story is the same. Pig ears are richer in fat, so treat them as an occasional reward rather than a daily chew. Shop Hairy Pig Ears · Shop Clean Pig Ears

Pig Snouts – Wisconsin pork
Built largely from cartilage and skin, pig snouts are naturally high in hydroxyproline – collagen's signature amino acid – making them one of our most collagen-dense chews and a leaner pork option than pig ears. Shop Pig Snouts

Chicken, Duck, and Turkey Necks – North Dakota chicken, Illinois & Pennsylvania duck, Michigan turkey
Every neck combines lean muscle, soft digestible bone, and cartilage. That cartilage matters: poultry is one of the few common food sources of Type II collagen, the type joint research focuses on. Chicken necks suit small dogs and cats, duck necks bring a novel protein, and turkey necks give bigger dogs a longer chew. All three are safe for dogs and cats. Shop Chicken Necks · Shop Duck Necks · Shop Turkey Necks

Icelandic Fish Chews – sourced and processed in Iceland
Every one of our fish chews is made from fish skin – and fish skin is a rich source of Type I collagen. Studies on Atlantic cod skin found its collagen comparable to bovine skin collagen, and Iceland's own marine collagen supplements are made from wild cod skin. Our Wolffish Flatties take it a step further: wolffish skin is famously thick and strong – for centuries it was Iceland's go-to fish skin for making shoes. And while they're made for dogs, plenty of cats go crazy for them too. Learn more about what makes our Icelandic fish chews special.

Chew on This

Collagen doesn't have to come from a bottle. Some of the best natural sources are exactly the parts dogs have always loved to chew – cartilage, skin, and connective tissue – and single-ingredient chews deliver them with nothing added and nothing to hide.

Ready to put a little more collagen in your dog's routine? Shop our Natural Dog Chews collection and find the right fit for your pup.

Frequently Asked Questions

Can dogs take collagen?
Yes. Collagen is a natural protein dogs digest like any other, and it's found naturally in cartilage, skin, and connective tissue. Introduce any new chew or supplement gradually.

Does collagen help dogs with itchy skin?
Collagen is a core part of healthy skin, and early research in people is promising, but there are no published trials in dogs yet. Talk to your vet about persistent itching – and consider single-ingredient, novel-protein chews to keep common triggers out of the treat jar.

How long does collagen take to work in dogs?
In the dog studies, joint improvements were measured over roughly 30 days to three months of daily supplementation. Think of collagen as a long game, not a quick fix.

How much collagen should I give my dog?
There's no set daily collagen requirement for dogs. Supplements list their own doses, and your vet can advise for your dog's size and needs. For chews, keep them a small part of the overall diet and adjust frequency to the chew – richer chews like pig ears work best once or twice a week.

Are collagen chews good for dogs' teeth?
Chewing itself is the benefit. Long-lasting natural chews help scrape away plaque and tartar as your dog works through them.

Is collagen the same as glucosamine?
No – they're different compounds with different roles. Collagen is the structural protein; glucosamine and chondroitin are building blocks of cartilage. Cartilage-based chews like ears and necks naturally carry all three.

Is collagen good for cats too?
Collagen is part of every carnivore's body, cats included. Our chicken, duck, and turkey necks are made for both dogs and cats, and cats love our fish chews, too – just match the size to your cat and supervise.