5 min read
Vet-recommended knee support
4.5 · 265 reviews

If your dog has stopped jumping into the car…

It's Not Just Age: 7 Things Owners Learn About a Dog's Back Knees

By the Wag Wize team Updated October 2026

The pause before the car. Shorter walks. Two tries to stand up. Most people call it age. But in dogs, the main knee ligament usually frays slowly, often for months, and the limp is often the last sign. Here's what owners of almost 8,000 dogs learned, and what they did about it.

  • Both back legs,
    harness included
  • Free U.S. &
    Canada shipping
  • 60-Day
    Perfect Fit
Illustration of a dog's back knee. The main ligament inside looks like a rope, frayed and thinning in the middle.

It's often the knee, not the age

The main ligament in a dog's back knee is the CCL. It's like the ACL in people. In most dogs it doesn't snap in one moment. It wears down slowly, a little at a time, often for months.1

While it frays, the knee gets a little loose, and your dog quietly works around it. That's why the early signs look like getting older, not getting hurt.

  1. Pauses before jumping into the car or onto the couch
  2. Walks get shorter. Lies down halfway through.
  3. Sits with one back leg kicked out to the side
  4. Takes two tries to stand up
  5. Then the limp. Often the last thing owners notice.

What owners often tell us they noticed, in the order they noticed it.

Illustration of a dog sitting, seen from behind, with one back leg kicked out to the side

The 10-second sit check

Ask your dog to sit on a flat floor, then look from behind. Are both back legs tucked in evenly? Or does one slide out to the side?

A kicked-out sit doesn't tell you what's going on. It's a good thing to mention to your vet.

Age is real. But "he's just getting old" can hide a knee that needs support. Your vet can check the knee in a few minutes.

A loose knee starts a loop. Rest alone doesn't break it.

Here's the part most owners don't hear. A loose knee wobbles a little with every step. So your dog moves less and leans away from it.

Less walking means less thigh muscle. And that muscle is one of the things that keeps a knee steady. So the knee gets looser, and the loop goes around again. We call it the Wobble Spiral.

Rest can help on a rough day. But rest alone doesn't hold a loose knee steady. Support at the knee does. That's what the Dual-Hinge Support System is built for: steadying both back knees so your dog can keep moving. Ask your vet how much activity is right.

A dog seen from behind. The sore back knee is circled, and the other back leg glows orange because it is working extra hard to carry the weight.

It supports both back knees, because the good one is doing double duty

A torn knee ligament is one of the most common causes of back-leg limping.2 When one knee hurts, your dog leans on the other back leg.3 And about 1 in 3 dogs that tear that ligament later tear the other one too.4

That's why owners who start with one sleeve often end up buying a second. This kit covers both back legs from day one.

Lisa G.Shelby's owner
Verified buyer
Shelby is walking better with the brace. It supports the leg with the torn CCL and her good leg as well! Easy to put on and she doesn't mind it at all!
Live on LooxSee all 265 reviews
Find my dog's size Rated 4.5 by 265 verified owners
Vinny sits down. Watch the sleeves.

Most knee braces slide off. This one hangs from a harness.

Most knee braces fail for three reasons: they have nothing to hang from, they cover only one leg, and they only squeeze.

The first is the big one. A sleeve is held up by your dog's thigh, and a thigh is shaped like a cone. So when your dog sits or lies down, the sleeve slides.

We built the Dual-Hinge Support System the other way around. Both sleeves clip to a full-body harness, so the brace hangs from your dog's back, not the thigh. A rear strap holds both sleeves high. The harness does the holding.

  • Both back knees
  • Full-body harness
  • Removable metal hinges
  • Rear height strap
  • Velcro on the inside
  • Soft neoprene
  • Potty-friendly
Alfonso D.11-year-old Beagle
Verified buyer
Since I purchased the product its been very helpful supporting my dogs knees… The harness does keep both braces from slipping and I do have to take it off when its hot because its neoprene. But in my opinion its a good product.
Live on LooxSee all 265 reviews
The hinge channels

Real hinges, both legs, harness. All in one box.

A soft sleeve squeezes the knee. That can feel snug, but it adds no structure. Many owners say sleeves feel no stronger than a wrap.

Each sleeve has a removable metal hinge at the knee. It bends with your dog's leg and adds support to every step. Both braces, both hinges and the harness come in one box. One order, one price.

Lots of braces are sold one leg at a time. Then the harness is extra. Then the belt to keep it up. Many owners find out after they order.

If your vet brought up surgery, you've seen the price. Many owners use this brace while they weigh options with their vet, like when a dog is too old for surgery or the cost isn't doable right now.

Jennifer F.Koda's owner, German Shepherd
Verified buyer
Very impressed with the quality of this harness. We tried two different brands first and they were junk. This one fits great and is a very well made product.
Live on LooxSee all 265 reviews

Sleeve and custom-brace prices seen at major retailers and brand sites, October 2026. Surgery costs vary by region, clinic and dog size. This brace is a support tool, not a replacement for surgery or your vet's advice.

Find your dog's size

$149.98 every size

How much does your dog weigh?

See sizes and order

Weights overlap? Thigh size decides. The size chart is on the next page, and our team can help. Between sizes? Get one made to measure.

  • Both back legs
  • Hinges built in
  • Harness included
  • 60-Day Perfect Fit
Where to measure your dog: A is the middle of the back thigh, B is the hock joint above the paw, C is the base of the tail
A Middle of the back thighB Hock, just above the pawC Base of the tail

Getting the fit right is our job too

There are three easy ways to find your dog's size, and they're all on the next page. Use one, or use all three to be sure.

  1. 1
    Start with weightEach size button shows a weight range, so you get a quick estimate in seconds.
  2. 2
    Check your breedType in your breed to see the size most owners of that breed chose, based on real customer fits.
  3. 3
    Measure to lock it inMeasure 6 spots in about 5 minutes for the most exact fit. Back leg girth (the very top of the thigh) and back leg length matter most.
  4. 4
    Between two sizes? Go customWe'll build one to your dog's exact measurements: a custom brace ($350).

Still not sure? Send us your dog's numbers and we'll help you pick. 60-Day Perfect Fit: wrong size? Exchange it for the right one, or get store credit.

Hands wrapping the Wag Wize knee sleeve around a dog's back leg Watch the full fitting, step by step
Shawna S.Lab owner, exchanged for a new size
Verified buyer
I first bought the wrong size for my lab, however I was able to return it for the correct size with no problem!! They even sent me a follow up email to make sure the second one fit properly!
Live on LooxSee all 265 reviews
Peek at the size chart

Size chart

Back leg girth Most important8.5–10.5Around the very top of the back thigh
Back leg length Most important8.5+Middle of the thigh (A) down to the hock (B)
Hip height5–7Base of the tail (C) straight down to A
Back length12–22Along the top of the back
Neck girth15–20Around the neck
Chest girth14–27Around the widest part of the chest

Measure with your dog standing naturally. If any number falls between two sizes or outside the chart, go custom for a fit made to your dog.

See every size at once
SizeLeg girthLeg lengthHip heightBackNeckChest
S8.5–10.58.5+5–712–2215–2014–27
M10–129+7–9.513–2416–2418–33
L13–159.5+8–1014–24.519–2819–38
XL15–1811+8.5–11.515–3023–3520–42
XXL16–1912+9.5–1316–3224–3822–45

Pick your dog's weight

$149.98 every size

How much does your dog weigh?

See sizes and order

Weights overlap? Thigh size decides. The size chart is on the next page, and our team can help. Between sizes? Get one made to measure.

  • Both back legs
  • Hinges built in
  • Harness included
  • 60-Day Perfect Fit
With the system Without support

Same dog, filmed by their owner. Drag the handle to compare.

Almost 8,000 dogs are already walking in it

Big dogs, small dogs, seniors and pups, all filmed by their owners. Videos marked Tap for sound have the owner talking.

A customer's dog wearing the Wag Wize brace A senior Boston terrier wearing the Wag Wize brace A customer's dog wearing the Wag Wize brace A customer's dog wearing the Wag Wize brace A customer's dog wearing the Wag Wize brace A customer's dog wearing the Wag Wize brace A customer's dog wearing the Wag Wize brace A golden retriever wearing the Wag Wize brace A German shorthaired pointer wearing the Wag Wize brace
4.5/5
From 265 verified reviews, collected by Loox

This brace isn't for every dog

  • Your vet says only one back leg needs support
  • Your dog can't stand or put weight on the back legs. A lift sling may be a better fit. Ask your vet.
  • You need support for the front legs. See our front leg brace.

None of those sound like your dog? Then this was built for them.

What to expect, honestly

  • It's a support, not a fix. It won't repair a torn ligament.
  • Start with short sessions and treats, then build up over the first week.
  • Check the fit after your dog lies down, especially at first.
  • Keep your vet in the loop.
Wag Wize Dual-Leg Hinged Knee Brace Harness on a dog, both back legs supported The Dual-Hinge Support System

4.5 · 265 verified reviews

Dual-Leg Hinged Knee Brace Harness

$149.98$299.9850% offBoth legs included · free shipping
  • Sleeves for both back legs, with removable metal hinges
  • Full-body harness and rear strap included. The brace hangs from your dog's back
  • Potty-friendly. No need to take it off for bathroom breaks
  • Size by weight, breed or measuring, or go custom
  • One-time purchase. No subscription.
Joint Care eBookFree with your order
Hands-Free LeashFree with your order

Sizes sell out often, and restocks take weeks.

Pick your dog's weight

$149.98 every size

How much does your dog weigh?

See sizes and order

Weights overlap? Thigh size decides. The size chart is on the next page, and our team can help. Between sizes? Get one made to measure.

  • Both back legs
  • Hinges built in
  • Harness included
  • 60-Day Perfect Fit

60-Day Perfect Fit Guarantee. Wrong size? Exchange it for the right one, or get store credit.

Every review, straight from Loox

Verified orders only. Every rating counted, good or bad.

Questions owners ask us most

Will it slide down my dog's leg?

That's the problem with sleeve-only braces: they have nothing to hang from. This one clips to a full-body harness, and the rear strap holds both sleeves high on the thigh. Measure all six numbers for a snug fit, and give it a quick check after your dog lies down, especially in the first week.

Can my dog pee and poop with it on?

Yes. No need to take it off for potty breaks.

Is it hard to put on?

The first fit takes the longest. After that, it's quick. Watch the fitting video above, go step by step, and message us if anything feels off.

My dog has one bad knee. Why support both?

When one knee is weak, the other back leg carries extra weight. Supporting both keeps the load more even, and it's one kit, so you never buy a second sleeve later.

How do I pick the right size?

Start with your dog's weight for a quick estimate, then check your breed to see the size most owners of that breed chose. For the most exact fit, measure all six spots on the size chart. Back leg girth and back leg length matter most. If your dog lands between sizes, go custom.

Do I need a vet visit first?

Many owners ask their vet before starting. The brace is a support your dog can wear on walks while you and your vet decide on a plan.

My vet mentioned surgery. Can my dog still wear it?

Ask your vet first. Many owners use the brace while they weigh their options. Some use it alongside the plan their vet recommends. Your vet knows your dog's knee best.

What if it doesn't fit?

The 60-Day Perfect Fit Guarantee covers an exchange for another size, or store credit. Braces are not refundable, and you pay to ship the brace back to us. That's why we ask you to measure everything first.

How long does shipping take?

Shipping is free to the U.S. and Canada and takes 8–12 business days. Popular sizes sell out, and restocks can take a few weeks.

Is it right for every dog?

It's made for dogs that can stand and walk on their back legs. Very short-legged breeds (like Corgis, Dachshunds, Bassets and Bulldogs) need a different fit, so message us first. If your dog can't put any weight on a leg, has an open wound, or is suddenly in bad shape, see your vet first.

1. Comerford EJ, Smith K, Hayashi K. Update on the aetiopathogenesis of canine cranial cruciate ligament disease. Vet Comp Orthop Traumatol. 2011;24(2):91–98. Describes cruciate ligament disease in dogs as mostly a slow, degenerative process, where the ligament weakens over time before it fails.

2. Della Valle G, et al. Outcome after Modified Maquet Procedure in dogs with unilateral cranial cruciate ligament rupture. PLoS One. 2021;16(8):e0256011. Describes cruciate ligament rupture as one of the most common causes of back-leg limping in dogs.

3. Souza ANA, Tatarunas AC, Matera JM. Evaluation of vertical forces in the pads of Pitbulls with cranial cruciate ligament rupture. BMC Vet Res. 2014;10:51. In dogs with one torn ligament, the injured back leg pushed down with about 24% of body weight, while the other back leg pushed down with about 39%, more than the 33–34% measured in healthy dogs.

4. Harasen G. Canine cranial cruciate ligament rupture in profile. Can Vet J. 2003;44(10):845–846. In two groups of dogs treated for a torn cruciate ligament, 27–30% later tore the other one, and the author advises owners to expect a 1 in 3 chance. See also: Chuang C, et al. Radiographic risk factors for contralateral rupture in dogs with unilateral cranial cruciate ligament rupture. PLoS One. 2014;9(9):e106389, where 33% of 85 dogs went on to tear the other ligament.

This page is an advertisement from Wag Wize. Every quote and video is from a real Wag Wize customer, shared in a verified review, a comment, a message or a video they sent us. Some quotes are shortened; "…" marks where. Some customers shown received a free gift for sharing. Results vary, and every dog is different.

The Wag Wize Dual-Leg Hinged Knee Brace Harness is a support and mobility aid, not a medical device. It is not a replacement for your vet's diagnosis, surgery or care plan. Talk to your vet about your dog's knee.

Find your dog's size

$149.98 every size

How much does your dog weigh?

See sizes and order

Weights overlap? Thigh size decides. The size chart is on the next page, and our team can help. Between sizes? Get one made to measure.

  • Both back legs
  • Hinges built in
  • Harness included
  • 60-Day Perfect Fit