Regenerative Medicine for Dogs: Stem Cells, PRP & the Evidence

Watching a dog slow down, limp after walks, or hesitate at the stairs is hard, and it’s natural to look for options beyond pain medication. Stem cell and PRP (platelet-rich plasma) injections are two of the most talked-about. We want to be direct from the start: no stem cell or PRP product is FDA-approved for dogs, the canine research is promising but small, and these treatments are not cures. This guide explains what they are, what the studies actually found, and how to talk to your vet about them.

Why this guide exists

In July 2026, my Australian Shepherd, Rocco, suddenly started walking close to walls, and something was off with his eyes and his blinking. We went to an emergency hospital that night, and to a board-certified veterinary ophthalmologist the next morning. She found his eyes themselves were healthy and pointed to a problem with a nerve in his face. A few days later, a veterinary neurologist examined him, and an MRI showed a mass in his brain with swelling around it.

Through all of it, I paid attention to the small things: how confidently he walked, whether he could still catch a tossed treat, whether he seemed comfortable at night.

When surgery wasn’t an option, I started looking beyond the usual path. We took Rocco to Chi University, near Gainesville, which offers alternative medicine and herbal remedies for dogs with serious brain tumors that surgeons won’t operate on. Rocco never had stem cell or PRP treatment, but searching for every possible option showed me how hard it is for owners to tell what’s backed by evidence and what’s only hope.

Rocco passed away in September 2026. We had to put him to sleep because he was in so much pain and he couldn’t support his own weight. You could tell the pain was too much for him.

What I took away is that a first diagnosis can change, specialists matter, and a lot of hope gets sold online. That’s why this guide says plainly what stem cell and PRP treatments can and can’t do — including that they are not cancer treatments.

— Matt Burkhalter, founder

Read Rocco’s full story →

What is regenerative medicine for dogs?

“Regenerative medicine” is a broad label. For dogs, it usually means one of two things:

• Stem cell therapy — most often mesenchymal stem cells (MSCs) collected from the dog’s own fat (adipose tissue), or sometimes from a donor dog, then processed and injected into the affected joint. MSCs are thought to work mainly by calming inflammation and sending signals that support healing, rather than by growing new cartilage.
• PRP (platelet-rich plasma) — a sample of the dog’s own blood is spun in a centrifuge to concentrate the platelets, which release growth factors, and the concentrate is injected into the joint.

Both are usually given under sedation and are typically used alongside, not instead of, the basics your vet already recommends: weight control, exercise changes, and pain management.

Which conditions is it used for?

• Osteoarthritis (arthritis). This is where most of the research is. Arthritis is common: a 2018 study of more than 455,000 UK dogs found about 2.5% of dogs under primary veterinary care were diagnosed with it in a single year, and estimates from referral settings are much higher in older dogs.
• Hip and elbow dysplasia. Developmental joint diseases that lead to arthritis, especially in large breeds. The ACVS pages on hip dysplasia and elbow dysplasia describe medical management and several surgical options; neither lists stem cells or PRP as a standard treatment. Regenerative injections are sometimes used for the arthritis that dysplasia causes.
• Cranial cruciate ligament (CCL) tears — the dog version of an ACL tear. The American College of Veterinary Surgeons says surgery is typically the best treatment because it is the only way to permanently control the instability. Injections are sometimes discussed alongside surgery, not as a replacement for it.

What the research in dogs shows — honestly

Stem cells for arthritis

The first randomized, blinded, placebo-controlled trial of stem cell therapy in dogs (Black et al., 2007) treated dogs with hip arthritis using cells from their own fat, and found better lameness and combined pain/range-of-motion scores than in control dogs. A later double-blind pilot (Maki et al., 2020) in 20 dogs with hip arthritis reported that dogs receiving donor stem cells improved by about two lameness grades on average, with no serious side effects — but only four dogs received the placebo.

a 2021 systematic review of stem cell injections in arthritic dog hips found six studies, only two of them randomized trials. All six reported improvement, but the studies were too different to combine into one result. a 2021 review reached a similar conclusion: owners and vets often see less lameness and pain, but imaging and gait results are less convincing, and the data need careful interpretation.

PRP for arthritis

In a randomized trial of 20 dogs (Fahie et al., 2013), a single PRP injection lowered median lameness and pain scores at 12 weeks, while saline-treated dogs did not improve significantly. A second double-blind trial in 20 police working dogs with hip arthritis (Alves et al., 2021) found better and longer-lasting pain and function scores with PRP than with saline — though dogs with severe arthritis responded less well, and some dogs in both groups were briefly lame after the injection.

Ligament (CCL) injuries

The evidence here is thinner. a 2024 randomized trial in 62 dogs found that adding PRP or hyaluronic acid to TPLO surgery did not speed recovery. a small 2026 pilot trial of a stem-cell-derived product given with TPLO reported faster recovery, but it involved only 20 dogs. For a torn CCL, surgery remains the standard of care.

The bottom line: the studies are encouraging but small, often short-term, and sometimes funded by companies that sell the products. Regenerative injections are a reasonable thing to ask your vet about for arthritis, not a guaranteed fix.

Is it FDA approved?

No. Animal stem cell and PRP products are regulated by the FDA Center for Veterinary Medicine, which states that no animal cell or tissue-based products are FDA-approved — a category that explicitly includes PRP alongside stem cells. FDA explains its approach in Guidance for Industry #218, and a handful of plasma and platelet products appear on its risk-reviewed list, but “risk-reviewed” is not the same as approved, and no canine stem cell product is on it.

The FDA’s Q&A for pet owners lists possible risks such as infection, disease transmission, and allergic reactions, and suggests owners consider FDA-monitored clinical studies. For comparison, the FDA approved Librela (bedinvetmab) in 2023, a monthly injection for arthritis pain in dogs, and later issued a letter to veterinarians about reported adverse events — a reminder that every option, approved or not, deserves a conversation with your vet.

What does it cost?

We have not found a reliable, independent published price range for stem cell or PRP treatment in dogs, so we won’t quote one. Cost depends on the practice, whether cells come from your dog or a donor, how many joints are treated, and whether repeat injections are needed. Ask for a written estimate that includes sedation, the fat or blood harvest, lab processing, and follow-up visits — and check with your pet insurer before treatment.

Questions to ask your veterinarian

• Has my dog’s problem been confirmed with an exam and X-rays?
• Is my dog a reasonable candidate, given age, weight, and how advanced the arthritis is?
• Which product do you use, where are the cells or platelets processed, and is it on FDA’s risk-reviewed list?
• What results have you seen, and how long do they usually last?
• How does this fit with weight control, exercise, pain medication, or surgery?
• What is the total cost, including follow-up injections?

For more background, see the ACVS overview of osteoarthritis in dogs and our article on stem cell therapy for dogs.

Frequently asked questions

Related reading

• Stem Cell Therapy for Dogs: What the Research Says
• What Is PRP Therapy? Uses, Evidence & What to Expect