Tendon Injuries in Dogs
The slow-healing shoulder and Achilles injuries that hide behind an on-and-off limp.
Tendons are the ropes that connect muscle to bone, and in dogs a few of them take most of the punishment: the biceps and supraspinatus at the front of the shoulder, and the common calcanean tendon, the Achilles, at the back of the hock. Injure one and the early signs are easy to shrug off, a limp that comes and goes, a slightly flat back leg, a quiet drop in performance. The awkward truth about tendons is that they heal slowly and re-injure easily, so the recovery runs long and how a dog is brought back to activity matters as much as the injury itself.
Tendon injuries in dogs run from mild reactive tendinopathy, where the tendon is irritated but still intact, all the way to a full rupture. The common sites are the biceps and supraspinatus tendons in the shoulder and the common calcanean (Achilles) tendon at the hock. Most tendinopathies are managed without surgery, using load management, physiotherapy, laser, and controlled hydrotherapy. A full Achilles rupture usually needs surgical repair first. Either way the tendon heals slowly, and the main risk is returning to full activity before it can take the load.
Quick facts
- What it is: injury to a tendon, the tough cord that anchors muscle to bone, from overload or trauma. In dogs the usual sites are the biceps and supraspinatus tendons in the shoulder and the common calcanean (Achilles) tendon at the back of the hock. It ranges from mild reactive tendinopathy to a complete rupture.
- Who gets it: most often middle-aged, active, medium-to-large dogs. Agility, flyball, and working dogs are over-represented for the shoulder tendons; the Achilles tends to go in older large breeds, or in any dog after a jump, a slip, or a laceration.
- The hallmark sign: depends on the tendon. Shoulder: a front-leg limp that worsens after exercise and hurts when the shoulder is stretched. Achilles: a dropped, flat-footed hock, where the heel sinks toward the ground (a plantigrade stance).
- Diagnosis: ultrasound is the workhorse, showing tendon thickening, fibre disruption, or mineralisation. X-rays are often normal or show only mineralisation. MRI gives the clearest picture. A careful hands-on exam localises the painful tendon.
- Treatment: load management and physiotherapy for most tendinopathies, with laser and controlled hydrotherapy to support healing. A full Achilles rupture usually needs surgery, the hock immobilised for 4 to 6 weeks, then months of graded rehabilitation.
What a tendon injury actually is
A tendon is the tough, rope-like tissue that ties a muscle to a bone and transmits the pull. It is built for tension, not for stretch, and it is made mostly of collagen with very few living cells threaded through it. That design is strong and efficient, but it is also why an injured tendon is slow to come back: there is not much blood supply or cellular machinery inside to run a fast repair.
Dogs concentrate their tendon trouble in a small number of places. At the front of the shoulder, the biceps and supraspinatus tendons take load every time the front leg reaches forward and absorbs a landing. At the back of the hock, the common calcanean tendon, better known as the Achilles, holds the heel at its working angle through every push-off. These are the tendons that show up again and again in active dogs.
Most tendon problems are not a single dramatic tear. They sit on a continuum. A tendon overloaded faster than it can adapt becomes reactive, then, if the overload continues, the repair gets messy and the tissue starts to break down. The four stages below map that path, from a tendon that is irritated but intact to one that finally gives way.
Where a tendon injury sits on that scale shapes everything that follows: how it looks, which dog tends to get it, and how long the road back really is. The two problem areas, the shoulder and the hock, behave quite differently, so it helps to line them up side by side.
| Shoulder tendons (biceps & supraspinatus) | Common calcanean tendon (Achilles) | |
|---|---|---|
| Where it sits | Deep at the front of the shoulder. The biceps tendon runs over the front of the joint; the supraspinatus lies just beside it. Both load when the front leg reaches out and lands. | The thick cord at the back of the hock, above the heel bone. It is really three tendons bundled together, with the gastrocnemius (calf) tendon the largest and the one most often injured. |
| Typical patient | Middle-aged, active, medium-to-large dogs, average age around six years. Agility and working dogs are common; Labradors and Rottweilers show up often in mineralised cases. | Older large breeds, and active or working dogs. It can build up slowly as a degenerative tendon, or tear suddenly after a jump, a fall, or a cut over the tendon. |
| What you see | A weight-bearing front-leg limp that is worse after exercise, pain when the shoulder is flexed and the elbow extended, and sometimes wasting of the shoulder muscle. Signs are often chronic and come and go. | A dropped, flat-footed hock (plantigrade stance). With a partial tear the toes curl under while the hock sinks; a complete rupture drops the hock right to the floor. Often an acute non-weight-bearing lameness. |
| How it recovers | Usually managed without surgery: load management, physiotherapy, laser, and time. Remodelling runs over months, and rushing back tends to flare it again. | A full rupture usually needs surgical repair plus the hock immobilised for 4 to 6 weeks, then months of graded rehab. Early or partial cases may be managed conservatively. Full return often takes several months to a year. |
Why tendons take so long to come back
Tendons are mostly rope-like collagen with very few cells and a thin blood supply, so they repair slowly and rarely end up quite as strong as before. After a real injury the tendon first lays down disorganised scar collagen, then spends months slowly re-aligning it along the line of pull. The collagen does not approach normal organisation until roughly 12 to 14 weeks, and full remodelling runs closer to 8 to 12 months.
This is the same slow-healing problem that makes a cruciate ligament injury such a long recovery. It is also why a limp settling down does not mean the tendon is ready, and why a dog put back on a leg that merely looks healed is the classic re-injury story.
Signs to watch for
Tendon signs depend on which tendon, but they share a rhythm: a limp that is worse after activity, eases with rest, then returns. Because the change is often gradual, many owners first notice a drop in performance or a new reluctance before any obvious limp appears.
- A front-leg limp that is worse after exercise, or the morning after a big day, and eases with rest (typical of a shoulder tendon injury)
- Pain or pulling away when the shoulder is stretched forward, or when the tendon at the front of the shoulder is pressed
- Wasting of the shoulder or upper-arm muscle on one side, from months of quietly guarding the leg
- A dropped or flat-footed hock, where the heel sinks toward the floor instead of holding a clean angle (common calcanean tendon)
- Toes that curl or knuckle under on the affected back leg while the hock drops, which points to a partial Achilles tear
- Swelling or thickening you can feel along a tendon, at the front of the shoulder or the back of the hock
- Reluctance to jump, slowness to rise, or a shortened stride on one leg
- A sudden yelp and a leg the dog will not put weight on after a jump, slip, or landing, which suggests an acute tear
Any of these that lasts more than a few days, or that keeps coming back after rest, is worth a proper orthopaedic exam. Tendon problems are easy to label as "just a sprain" and then leave under-treated for months, which is exactly how a recoverable tendon slides into a degenerative one.
How AURA helps
Tendon rehabilitation follows a clear logic: calm the irritated tissue, protect it while the collagen reorganises, then rebuild its capacity to take load in careful steps. AURA's job is to control that load precisely, week by week, so the tendon is challenged enough to get stronger without being pushed into re-injury.
Noticed a limp that keeps returning, or a back leg gone flat-footed?
Those are two of the most common tendon-injury patterns in dogs. WhatsApp us what you have seen and when it started, and we will tell you whether it fits and what an assessment would involve.
Common myths that get dogs re-injured
A few beliefs cause more tendon re-injuries than anything else. Worth clearing up early.
- "Rest alone will fix it": rest calms the irritation, but it does not rebuild the tendon's ability to take load, so a rested-then-returned dog often re-injures within weeks. What rebuilds it is graded reloading, added back in steps.
- "No limp means it's healed": the limp usually settles long before the tendon has remodelled. The collagen keeps reorganising for months after the leg looks normal, which is exactly the window when a too-fast return causes a re-tear.
- "It's just a sprain, give it a week": a true tendon injury runs on a scale of weeks to months, not days. A tendon still sore after a week or two is not a minor niggle and deserves a proper look.
- "Anti-inflammatories will sort it out": medication can make a dog more comfortable, but it does not reorganise tendon collagen or rebuild load tolerance. It supports rehabilitation; it does not replace it.
Recovery and return to activity
Tendon recovery is measured in months, and it does not move in a straight line. The work is to load the tendon just enough to push it back toward healthy along the continuum, without tipping it into a flare or a fresh tear.
Settle and protect (weeks 1 to 6)
Early on, the aim is to calm the reactive, irritated tendon and remove the overload that started it. For most shoulder tendinopathies that means controlled rest, short lead walks, laser, and keeping the dog off slippery floors and away from jumping. For a repaired Achilles it means the hock stays immobilised in a cast, splint, or frame for 4 to 6 weeks so the repair is not loaded before it can hold. As with the early weeks of recovery after a fracture repair, that time in a cast builds compensation patterns that physiotherapy then has to unpick. Supervised swimming can keep the rest of the body moving without stressing the tendon.
Reload in steps (weeks 6 to 16 and beyond)
Once the tendon settles, load is added back on purpose: longer controlled walks, then isometric and strengthening work, then underwater treadmill sessions that raise limb load as the water drops. Progress follows the dog's response, not the calendar. If the tendon flares, the programme steps back a level rather than pushing through. This middle phase is the longest and the least dramatic, and it is where most of the real repair happens.
Return to normal life or sport
Full activity resumes only when the dog can manage its everyday walks, or its sport-specific work, with no limp and no guarding. For sporting dogs this is a graded return: build duration before intensity, and turns before sprints. Because tendon tissue keeps remodelling for months, this last phase is slow by design. It is the point where the whole recovery is either protected or thrown away.
Managing a tendon dog at home in Singapore
Between sessions, the home environment does a lot of the work. In most Singapore homes the biggest hidden hazard is the floor.
Tile and marble in HDB flats and condos give a dog almost no grip. A dog recovering a shoulder or Achilles tendon slips, scrambles to catch itself, and loads the healing tendon in exactly the way you are trying to avoid. Laying runners, yoga mats, or carpet tiles along the routes your dog actually uses, from the bed to the door and around the sofa, takes that risk away.
- Lay non-slip runners on the paths your dog uses most; bare tile and marble are the main indoor re-injury trap
- Block jumping on and off sofas and beds, and block stairs, with a ramp, a low step, or a closed door during the restricted phase
- Keep walks short, on-lead, and on grass or textured pavement rather than smooth polished corridors
- Keep weight down: every extra kilo is extra load through a healing tendon, and lean dogs recover more predictably
- Do the prescribed home exercises little and often rather than in one long session, and stop if the limp gets worse
Cooler morning or evening walks and an air-conditioned rest space help too, since a comfortable dog moves more evenly and rests better between sessions.
Outlook
For most tendinopathies caught before they degenerate, the outlook is good. Reactive and early-stage tendons respond well to load management and physiotherapy, and many active dogs get back to full work. The catch is time. This is a months-long recovery, and the dogs that do best are the ones whose owners hold the line through the slow middle phase, when the leg already looks fine.
Degenerative tendons and full ruptures are harder. A common calcanean tendon rupture repaired promptly and rehabbed properly generally does well, with many dogs returning to comfortable function, though it can take several months to a year and the tendon rarely ends up exactly as strong as new. Chronic, long-degenerated shoulder tendons can grumble on and may need ongoing management rather than a one-time fix. Older dogs often carry arthritis alongside the tendon problem, which shapes what full recovery realistically looks like.
The single biggest factor in the outcome is not the grade of the injury. It is whether the dog is returned to load too early. Re-injury resets the clock and can turn a recoverable tendon into a chronic one.
What to ask your vet
Worth a screenshot before the appointment:
- Which tendon is involved, and does this look reactive, degenerative, or a tear?
- Would ultrasound, or MRI, help grade the injury before we plan rehabilitation?
- Is surgery needed here, or is this a case we can manage conservatively?
- How long should the tendon be rested or immobilised before loading starts?
- Are there concurrent problems, in the elbow, the shoulder, the other leg, or arthritis, that could affect recovery?
- For a sporting dog: what is the realistic minimum timeline before a return to training?
When to call your vet
During recovery, contact your vet promptly if:
- The hock suddenly drops or the dog stands flat-footed on a back leg: possible tendon rupture or breakdown of a repair
- A limp returns or worsens after a spell of improvement: usually a re-injury from too much load too soon
- The leg becomes non-weight-bearing after a jump, slip, or fall: points to an acute tear
- Heat, swelling, or discharge appears around a surgical site or a cast: possible infection or a pressure sore under the coaptation
- A cast or splint slips, smells, or the toes below it swell: the coaptation needs checking the same day
- Recovery stalls with no progress after several weeks of appropriate rehab: time to re-image and reassess the tendon
Common questions
How long does a tendon injury take to heal in a dog?
Longer than most owners expect. A mild reactive tendinopathy caught early can settle in a few weeks of load management, but a tendon with real fibre damage remodels over months. The collagen does not approach normal organisation until around 12 to 14 weeks, and full remodelling runs closer to 8 to 12 months. A repaired Achilles rupture needs 4 to 6 weeks of hock immobilisation first, then months of graded rehab. The leg usually looks normal long before the tendon is truly ready, which is why timelines are set by the tissue, not the limp.
My dog is standing flat-footed on a back leg. What does that mean?
A dropped, flat-footed hock, called a plantigrade stance, is the classic sign of a common calcanean tendon problem, the dog's Achilles. When the tendon stretches, partly tears, or ruptures, it can no longer hold the heel bone at its normal angle, so the hock sinks toward the ground. If the toes also curl under while the hock drops, that suggests a partial tear affecting part of the tendon bundle. Either way it is worth a prompt orthopaedic exam and usually an ultrasound, because a full rupture generally needs surgical repair.
Does a tendon injury need surgery?
Often not. Most shoulder tendinopathies, biceps and supraspinatus, are managed without surgery, using load management, physiotherapy, laser, and controlled hydrotherapy over time. Surgery comes into the picture mainly for a full rupture of the common calcanean (Achilles) tendon, where the torn ends have to be repaired and the hock immobilised while they heal. Some chronic or badly degenerated tendons are also treated surgically when conservative care stalls. The right answer depends on which tendon, how badly it is damaged, and how the dog has responded so far, which is why grading the injury first matters.
Can laser or hydrotherapy actually help a tendon injury?
Yes, as part of a structured programme rather than on their own. Therapeutic laser (photobiomodulation) is used to ease inflammation and support the repairing tissue in the early and middle phases. Hydrotherapy and the underwater treadmill are among the most useful tools for the hardest part of tendon rehab, which is reloading the tendon gradually. The water sets how much weight the leg carries, so load can be raised in small, controlled steps. What none of them replace is the graded strengthening and the patience the tendon needs to remodel.
Why does my dog keep re-injuring the same leg?
Almost always because the tendon went back to full load before it had rebuilt the capacity to handle it. A tendon can look and feel healed on the outside while the collagen inside is still disorganised and weak. Rest alone does not fix that; it removes the irritation but leaves the tendon under-prepared, so the first hard run or jump re-tears it. The way out is a graded loading programme that rebuilds tolerance in steps, plus fixing whatever keeps overloading the leg: slippery floors, too much too soon, or a problem in another joint.
How is a tendon injury different from a torn cruciate or a pulled muscle?
They are related but not the same. A muscle strain is damage to the muscle belly, which has a good blood supply and usually heals faster. A tendon is the rope that anchors muscle to bone, with few cells and a poor blood supply, so it heals slowly and needs careful reloading. A cruciate ligament tear is a different structure again, inside the knee, and often needs surgery. All three cause lameness and can look alike from the outside, which is why hands-on testing and imaging are used to tell them apart before choosing a treatment.
Sources
- Cook JL, Purdam CR. Is tendon pathology a continuum? A pathology model to explain the clinical presentation of load-induced tendinopathy. Br J Sports Med. 2009;43(6):409–416. PubMed
- Canapp SO Jr, Canapp DA, Carr BJ, Cox C, Barrett JG. Supraspinatus tendinopathy in 327 dogs: a retrospective study. Vet Evid. 2016;1(3). Veterinary Evidence
- Bruce WJ, Burbidge HM, Bray JP, Broome CJ. Bicipital tendinitis and tenosynovitis in the dog: a study of 15 cases. N Z Vet J. 2000;48(2):44–52. PubMed
- Wylie S, et al. Complications and outcomes following surgical management of common calcaneal tendon pathology in 80 dogs. Vet Surg. 2025. Veterinary Surgery
- Levine D, Millis DL (eds). Canine Rehabilitation and Physical Therapy. 2nd ed. Saunders/Elsevier; 2013.
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