Red Light Therapy for Dogs and Pets: Does It Work?
Short answer: red light therapy is widely used by veterinarians and pet owners to support dogs, cats, and horses — most often for arthritis, sore joints, muscle strains, and slow-healing wounds. It's drug-free and non-invasive, and small veterinary studies have found it can ease pain and even reduce the need for anti-inflammatory medication. It isn't a cure, and anything involving an injury or illness should start with your vet.
If your older dog is slowing down on the stairs, or your cat is stiff after a nap, you've probably wondered whether the same red light therapy people use could help them too. Here's an honest, plain-English look at what it does, whether it's safe, and how to use it at home.
Does red light therapy actually work for dogs and pets?
It shows real promise, especially for joint pain. The mechanism is the same in animals as in people: red and near-infrared light is absorbed by cells, where it's thought to support energy production, circulation, and the body's normal repair processes. Because dogs, cats, and horses share the same basic cellular biology, the therapy translates across species — which is why “laser therapy” has become common in veterinary clinics.
The evidence is still emerging, but it's encouraging. In a randomized, placebo-controlled trial in dogs with elbow osteoarthritis, dogs receiving photobiomodulation were far more likely to reduce their anti-inflammatory (NSAID) dose than those getting sham light. A separate 2022 controlled trial in dogs with hip osteoarthritis reported reduced pain and improved clinical signs. Both used professional-grade veterinary devices, so it's fair to think of at-home LED devices as a gentler, supportive version of the same idea — not a clinical replacement.
What do people use red light therapy for in pets?
- Arthritis and joint pain — especially in senior dogs and cats who are stiff or slowing down.
- Muscle strains and post-surgery recovery — as a supportive add-on to your vet's plan.
- Wounds, hot spots, and lick granulomas — to support the skin as it heals.
- General mobility and comfort — many owners use it as a calming daily ritual for an aging pet.
Is red light therapy safe for dogs and cats?
For most pets, yes — it's non-invasive, drug-free, and doesn't use the UV rays that can damage skin. A few common-sense precautions: never shine the light directly into your pet's eyes, keep sessions short, and let your pet move away whenever they want (their comfort is the best guide). Don't use it over a suspected tumor, an active infection, or a fresh, hot wound without your vet's okay, and avoid it on pregnant animals unless your vet approves. Near-infrared light produces a gentle warmth, not a burning heat — if it ever feels hot against the back of your hand, move it farther away.
Can I use a human red light device on my dog?
Yes. A quality home device that delivers 660nm red and 850nm near-infrared light works on pets the same way it works on you. For most dogs and cats, a compact, targeted device is easiest to aim over a specific joint or sore spot through the fur.
- For a targeted joint, hip, or sore spot: the pocket-sized FX35 mini panel ($199.99) or the handheld device ($199.99) are easy to hold a few inches from the fur.
- For a larger dog or full-body coverage: a panel like the FX300 ($199.99) lets your dog rest in front of it while you treat a wider area.
- Not sure what fits? Browse the red light therapy collection, or take the 60-second device quiz.
How do I use red light therapy on a dog at home?
- Pick a calm moment — after a walk or before bed, when your pet is relaxed.
- Part the fur or hold the device 1–3 inches from the skin over the joint or area (thick coats absorb some light, so get close).
- Keep it to about 3–5 minutes per spot, once or twice a day to start.
- Watch their body language. Most dogs settle in and enjoy the warmth; if yours pulls away, stop and try again later.
- Give it a few weeks. Like most gentle wellness routines, the benefits tend to build with consistency rather than overnight.
Does FSA or HSA cover red light therapy for pets?
Honestly, no — FSA and HSA funds cover devices for your own health, not veterinary care. That said, plenty of households buy one FSA-eligible device for a person's aches and use it on the family dog too. If you're buying primarily for yourself, here's how to pay with your FSA or HSA.
Frequently asked questions
Does red light therapy help dogs with arthritis?
It's one of the most studied uses. Small veterinary trials have found photobiomodulation can ease osteoarthritis pain and lower NSAID needs, though it works best alongside your vet's plan, not instead of it.
Is it safe for cats?
Generally yes — the same precautions apply: avoid the eyes, keep sessions short, and skip it over tumors or infections without veterinary guidance.
How often can I use it on my pet?
A few minutes per area, once or twice daily, is a common starting routine. More isn't better.
Will the fur block the light?
Thick coats absorb some light, so part the fur or hold the device close (1–3 inches) to the skin over the target area.
Can I use the same device on myself and my dog?
Yes — a 660nm + 850nm device works for both, and many owners share one across the household.
A few quiet minutes of warm, soothing light can be a comforting daily ritual for an aging pet — just start slow, follow their lead, and loop in your veterinarian for anything beyond general comfort. Lights on, pain off.
This article is for general education and is not medical or veterinary advice. Red light therapy devices are intended for general wellness and are not intended to diagnose, treat, cure, or prevent any disease. Always check with a qualified veterinarian before starting a new therapy for your pet, especially for any injury, illness, or post-surgery care.