Red Light Therapy Pads for Dogs: Do They Work?

This page is part of MedcoVet’s clinical education library on photobiomodulation in veterinary medicine. It explains red light therapy pads, mats, and wraps for dogs, how light delivery is judged clinically, where these devices fit, and when veterinary guidance should come first.

Do red light therapy pads work for dogs?

Red light therapy pads for dogs can help with surface-level problems when they deliver enough light. But most pads don’t have the proven light output or skin contact needed to reach deeper issues like arthritis, hip dysplasia, or IVDD. How well a pad works depends on its wavelengths, how much light reaches the target tissue, and whether that light can get past your dog’s fur.

Research supports photobiomodulation (PBM) for some veterinary conditions, including canine osteoarthritis (Looney 2018; Alves 2022). However, those studies used clinical laser equipment, and their results don’t show that a consumer LED pad can do the same.

A pad that works well against bare skin may perform very differently on a dog with fur. Contact, coat color, wavelength, and optical output all affect how much light reaches the target tissue (Hochman-Elam 2020; Hoisang 2022).

Bottom line: pads can work for surface problems if they deliver the right dose. For deeper joints, muscles, or the spine, you’ll want a device with proven output and a way to actually reach the skin.

Wondering whether red light therapy could help your dog at all? Take the 2-minute quiz to find out if it’s a good fit.

Key Takeaways

• Pads may help surface-level targets when they deliver enough light, but most can’t show the output or skin contact that deeper joints and the spine need.
• Fur, poor contact, and distance cut the light that reaches the skin. In living dogs, a 1 cm gap dropped the light passing through the skin from about 13 mW to 3.5 mW.
• Electrical watts and LED counts don’t tell you the dose. Ask for optical output and irradiance (mW/cm²) at the treatment surface.
• MedcoVet’s WAIT Test™ checks safety, wavelengths, average power, irradiance, and whether the light can reach the target tissue.
• Never leave your dog unattended on an active pad, mat, or bed.

What is red light therapy for dogs?

Photobiomodulation (PBM), also called red light therapy, low-level laser therapy, LED therapy, cold laser, or near-infrared therapy, uses specific wavelengths of red and near-infrared light to influence cell activity linked to inflammation, pain, and tissue repair (Hamblin 2017).

The biological response depends on the wavelength, the dose, and where the light is applied.

For a complete introduction, including research and safety, see our guide to red light therapy for dogs. You can also learn how it works at the cell level in the science of red light therapy.

Why red light therapy pads are so popular

Red light therapy pads cover more of your dog’s body and don’t ask much of you. They appeal to pet parents because they:

• Cover larger treatment areas
• Are usually hands-free
• Can be placed over the back, hips, or legs
• Fit into a regular home-care routine
• May be easier for some dogs to tolerate than a handheld treatment

Some manufacturers also market pads for arthritis, IVDD, soft tissue injuries, or post-surgery recovery.

I get why people are drawn to them.

But just because a pad covers a big area doesn’t mean it’s doing much. It might light up your dog’s whole back while barely any of that light reaches the spine under all that fur.

What matters is how much light reaches the target tissue. That decides whether a device has a real chance of helping.

The core problem: light delivery

For photobiomodulation to work, you need the right wavelengths and enough light hitting the right spot. Pads run into four big problems.

1. Fur blocks light

Dogs have something human light therapy devices rarely deal with: fur. Fur reflects, scatters, and absorbs light before it reaches the skin.

In a study of 47 dogs, Hochman-Elam 2020 found that coat color, power, shaving, and the laser used (a Class IV 810/980 nm laser versus a Class IIIb 904 nm laser) significantly affected how much light passed through. Darker and unshaved coats reduced transmission, and the authors recommended shaving before laser therapy. The study tested clinic lasers, not pads, but the same coat barrier applies to any light source.

Coat length alone was not a significant predictor in that study. Coat density, pigmentation, and how the device contacts the skin also matter.

So the number on the box may not reflect the dose your dog’s body actually gets. Even if you press the pad right up against your dog’s coat, the light still has to fight through a layer of hair before it reaches the skin.

For more, read how much light makes it through pet fur.

2. Poor contact with your dog’s body

A flat pad has to fit an uneven, bumpy surface. That’s hard around:

• Hips and shoulders
• Knees and hocks
• The spine
• Curved muscle groups
• Small or narrow limbs

If parts of the pad lift off the body, the light has even farther to travel. Depending on the device’s optical design, this can lower the irradiance at the treatment surface or make exposure uneven.

In a study measuring light through living dog tissue, a device held against the skin delivered about 13 mW through the skin, while the same device held 1 cm away delivered about 3.5 mW (Hoisang 2022).

A wrap might hug the body better, but putting LEDs against fur isn’t the same as getting light directly to the skin.

3. Low or unverified power density

Irradiance is how much light power hits each square centimeter, measured in mW/cm². It tells you how concentrated the light is right where it matters: at the treatment surface.

Many pads advertise their total electrical wattage or the number of LEDs instead. A listing might claim a “60W pad,” but that number may reflect electricity use or the LEDs’ rating. It doesn’t tell you how much light actually comes out, or how much reaches your dog’s skin.

Without a real irradiance measurement at the treatment surface, you can’t know how much energy your dog is getting.

4. Limited depth

Red light is typically used for problems close to the surface, while near-infrared light can reach deeper because longer wavelengths travel further into tissue (Lanzafame 2020).

Even with the best wavelength, most of the light is lost on the way down. In the living-dog study above, only about one-tenth as much light made it through skin and muscle as through skin alone (Hoisang 2022).

The right wavelength can’t make up for weak light delivery. The amount of light reaching a hip joint or the spine is affected by:

• The wavelength
• The optical output
• Skin contact
• Fur and pigmentation
• Tissue thickness
• The distance to the target

A pad might have near-infrared LEDs and still not deliver enough energy to reach deeper spots.

“In my experience, there are very few furred animals that will benefit from treatment with a red light therapy pad. Most pads do not fit snugly enough to make direct contact with the skin in the areas intended for treatment. For example, if treating a dog with hip dysplasia and osteoarthritis, the pad lays loosely across the lower spine and hips, making very little contact with the dog giving the light more distance to travel. Even with the more ‘fitted’ vests or sleeves, there is still fur for the light to travel through, making it unlikely to reach the targeted tissue.

I can recall one pet parent, she happened to be an R.N., that used a red light therapy pad after her border collie had surgery for IVDD. She was very unsure if the pad aided in the dog’s long recovery and comfort, but as the dog was shaved for surgery, she did notice that the fur grew back very quickly. She believed that this was due to the red light of the therapy pad. That makes sense as the pad was in direct contact with the skin and the red light emitted from the pad can be therapeutic for superficial conditions.” Kristy Williams, CVT, CCFT

How pads score on the WAIT Test™

MedcoVet developed the WAIT Test™ to help pet owners evaluate red light therapy devices using measurable factors.

The safety gate

Before scoring performance, every device passes through one safety gate. A home device fails if it is a Class 3B or Class 4 laser or an RG2 or RG3 LED, and gets a NOT SAFE FOR HOME USE result. A laser with no published class gets NEED MORE INFO until its class is published.

W: Wavelengths

Does the device produce wavelengths that suit the intended treatment?

For a general-purpose device, look for:

• Red light, commonly around 620–680 nm, for superficial targets
• Near-infrared light around 800–900 nm for broader tissue-depth coverage
• Documentation showing which wavelengths run together and how their output is split

Research supports biological effects for both red and near-infrared light (Hamblin 2017). Near-infrared light matters most for deeper targets because longer wavelengths generally penetrate further (Lanzafame 2020).

Manufacturers should give exact values instead of broad labels like “infrared light.” See the WAIT wavelength guide.

A: Average power

How much optical power does the device actually produce during treatment?

Average optical power is measured in milliwatts (mW) or watts (W). It is not the same as:

• Electrical input
• LED rated wattage
• Peak power
• LED count

For pulsed devices, average output also depends on the duty cycle and settings. A pad advertised as 60W may use 60W of electricity while delivering far less optical power. Without optical-output figures, wattage claims can’t establish a treatment dose.

I: Irradiance (power density)

How concentrated is the optical power at the treatment surface?

Irradiance is measured in mW/cm². For pads, we want to know the irradiance:

• At the light-emitting surface
• At the distance used during treatment
• Across the intended treatment area
• After accounting for fur and poor contact

These numbers show whether a device can deliver a suitable dose in a practical treatment time. A light meter reading on a flat surface is useful, but it doesn’t automatically reflect what reaches the skin of a furry dog.

T: Target tissue

Can the light reliably reach the tissue being treated during normal use?

This matters most for pads, mats, and wraps. A device needs a realistic way to deal with your dog’s coat and shape. Check whether it:

• Keeps contact over curved areas
• Reaches the skin instead of resting on top of fur
• Minimizes air gaps
• Keeps exposure even across the target
• Can be placed accurately over the tissue being treated

The T result changes with the dog’s coat and the target. A pad may be reasonable for a superficial area with exposed skin, yet fail the same check for a deep hip joint under a dense coat.

How the verdicts work

The WAIT Test™ gives one of four results for the intended use:

• PASS: the information supports every check for that use.
• NEED MORE INFO: a figure is missing, so the device can’t pass yet.
• FAIL: a figure is known and falls short.
• NOT SAFE FOR HOME USE: the device fails the safety gate.

Missing specifications don’t prove a device puts out no therapeutic light. For example, a pad that hasn’t published its average optical power and skin-level irradiance gets NEED MORE INFO on A and I, and can still FAIL T for a deep joint under a dense coat.

See how to evaluate red light therapy devices for the full method.

How pads typically score

Most pads, mats, and wraps we’ve looked at tell you their wavelengths but not how much light actually reaches your dog’s skin. Usually they list total wattage or the number of LEDs, which doesn’t tell you how effective the device really is.

When MedcoVet measured one pet light therapy device we purchased, a LumaPet unit, we recorded about 1–2 mW/cm² at the meter (see our measurement notes). Results can vary by unit, contact, and distance.

See how every device we’ve scored compares, including pads, wraps, and handheld devices, in our red light therapy device comparison.

Red light therapy wraps, vests, and beds for dogs

Different wearable designs can make things easier for you, but they also change how light reaches your dog’s body.

Leg and joint wraps

Wraps can fit a dog’s leg more closely than a flat pad, which makes them potentially useful for knees, hocks, and other smaller areas. But a wrap that sits snugly against the coat still isn’t touching the skin.

Vests

A vest may cover more of the torso or spine while keeping your dog fairly comfortable. Fit is especially important: loose sections create gaps, while a well-fitted vest holds its emitters more consistently against the coat. For IVDD or other spinal conditions, treatment depth and accurate positioning matter.

Beds and blankets

Beds and blankets offer broad coverage and need little handling. But your dog’s position, the layers of fur, any padding, and even small gaps all change how much light gets where you want it. A dog may also lie on the light source longer than intended. Even if a device claims to stay cool, long sessions can cause trouble, especially for older dogs, dogs with reduced feeling, or dogs who can’t move around easily.

What about PEMF pet beds?

Pulsed electromagnetic field therapy (PEMF) uses changing magnetic fields, not therapeutic red and near-infrared light. A PEMF bed without light emitters is a different type of device and can’t be assessed with the photobiomodulation WAIT Test.

When a red light therapy pad may still be useful

Pads can make sense in some cases, especially when the target is close to the skin and the device delivers enough light.

Superficial skin conditions

If there’s little fur and the target is right under the skin, a pad may do the job. Have your vet diagnose the problem first, especially if there’s infection, unexplained irritation, or a suspicious growth.

Small wounds

Researchers have studied photobiomodulation for wound repair, and surface treatments avoid some of the depth problems of joint therapy. Wounds are one of the main uses studied in animals, although the quality of that research varies (Millis 2023).

Don’t place a pad directly against an open wound unless the device is designed for it and your veterinarian has approved it. Cleaning, infection control, and other wound care still come first.

Superficial soft tissue targets

Some fairly shallow muscle and soft tissue areas may be reachable with a suitable pad. Depth still depends on your dog’s anatomy, coat, and the dose.

“In my opinion, dogs with skin conditions such as alopecia may find the red light therapy pads beneficial because the pad would lay directly onto the skin. Care and supervision should always be used. Using a red light therapy pad on an undiagnosed skin condition is never advised and care should always be used when the skin is moist, there is infection or treating a surgical incision to keep the area clean. Pets should never be left unsupervised with a pad or wrap on.

Signs of improvement may include the wound surface getting smaller in size, becoming less red and inflamed, or hair regrowth. If the red light therapy pad is helping, the condition should improve daily. As a certified veterinary technician, I would always advise pet parents to look for improvement daily, even if improvement is slow. If the area looks worse, more redness, discharge, larger, they should discontinue red light therapy and consult their veterinarian.” Kristy Williams, CVT, CCFT

Red flags to watch for

Before you buy a red light therapy pad or mat, watch out for these warning signs:

• It lists electrical wattage as if that’s the amount of therapeutic light your dog gets.
• It talks up the number of LEDs but doesn’t say how much light reaches your dog’s skin (irradiance).
• It promises to treat deep tissues without explaining how the light gets through fur.
• It claims every condition needs the same session length, no matter what or where you’re treating.
• It doesn’t state the treatment area or how much light it emits.
• It lacks clear instructions for dosing, safety, or use on animals.
• It recommends very long sessions without explaining the energy delivered.
• It presents clinical studies done with other equipment as direct proof that the pad works.

Longer sessions won’t make up for weak or missing light at the skin. Photobiomodulation has a dose-response relationship: both too little and too much exposure can reduce the effect you want (Huang 2009). Treatment time should come from the output at the treatment surface, the target, and the prescribed dose.

Are red light therapy pads safe for dogs?

Red light therapy is usually safe with the right equipment and settings. But pads, mats, wraps, and beds come with their own safety issues.

Heat and long sessions: watch for unwanted warmth, especially with a blanket or bed. Never leave your dog alone on an active device or let them sleep on it overnight.

Skin irritation: stop if your dog seems uncomfortable or you see redness or sensitivity. Follow the manufacturer’s eye-safety guidance.

Electrical and chewing risks: keep cords and connectors out of reach if your dog likes to chew.

Dogs who can’t feel well or move easily need extra attention. They might not move away if something feels wrong or they get too warm.

When not to use a red light therapy pad

• Emergencies: if your dog suddenly can’t walk, collapses, loses bladder control, or cries out in pain, see a vet now. A light device is not the first step.
• Undiagnosed pain: get a diagnosis before you treat.
• Possible cancer: don’t use it over a known or suspected tumor unless your vet approves.
• Pregnancy and growing puppies: ask your vet first.
• Over the eyes: keep the light away from your dog’s eyes.

For the full safety discussion, see our guide to contraindications for red light therapy.

How to choose the right red light therapy device for your dog

The best device depends on what you’re treating, how deep the problem is, your dog’s coat, and how much light the device can actually deliver. For shallow problems, a well-specified pad might do the trick. For arthritis, hip pain, spine problems, or deeper injuries, you’ll want a targeted device with proven output and good skin contact.

MedcoVet’s Luma is a handheld red and near-infrared LED device designed for home use. Manufacturer data says it uses 635 nm and 850 nm wavelengths, delivers about 70 mW/cm² at contact, and includes an optical comb to help light reach the skin through fur. Our clinicians build a treatment plan for each pet. See Luma’s full specs.

For a full comparison of handheld options and other device types, see our red light therapy device roundup.

Real dogs, real results

Pet parents using Luma at home with a clinician’s plan share how their dogs are doing.

Clinical summary

Mechanism

Red and near-infrared light is absorbed by cells and can influence activity linked to inflammation, pain, and tissue repair. The response depends on wavelength, dose, and where the light lands (Hamblin 2017).

Evidence level

Randomized trials support photobiomodulation for canine osteoarthritis, but they used clinical lasers (Looney 2018; Alves 2022). None of the studies cited here tested consumer LED pads, so results from clinical devices shouldn’t be assumed to carry over.

When it works best

Pads are most likely to help superficial targets with little fur, when the device has a verified irradiance at the treatment surface and stays in good contact with the skin.

When not to use

Emergencies, undiagnosed pain, over known or suspected cancer, over the eyes, and unsupervised use on beds or blankets. Pregnant dogs and growing puppies need a vet’s OK first.

Limitations

Fur, coat color, air gaps, and tissue depth all cut the light that reaches the target (Hochman-Elam 2020; Hoisang 2022). Most pads don’t publish optical output or skin-level irradiance, so their real dose is unknown.

Red light therapy pad questions pet owners ask

Evidence Citations