CONDITION
Supraspinatus Tendinopathy
Supraspinatus tendinopathy describes a problem with the supraspinatus tendon, which connects a shoulder muscle to the top of the upper arm bone in the front leg. The tendon can become damaged, inflamed, or begin to break down over time, often in response to repeated strain or wear. This is one of the more common soft-tissue problems affecting the shoulder in dogs, and can occur in cats as well, though less frequently. Owners often notice a front-leg lameness that may come and go, or a reluctance to bear full weight after exercise or rest. The limb may appear stiff when the dog first gets up, or the dog may hold the leg in a slightly altered position. Some dogs show discomfort when the shoulder is moved in particular ways, or when pressure is applied over the front of the shoulder. This page explores the signs that may point towards supraspinatus tendinopathy, what is happening within the tendon and surrounding structures, how the condition is investigated through examination and imaging, and the range of approaches that exist to support healing and manage discomfort. The course can vary widely depending on the severity of tendon damage and the individual animal's activity level and build.
Why this matters now
Supraspinatus tendinopathy tends to appear in middle-aged to older dogs, often between five and ten years, though younger animals undergoing intensive activity can also be affected. Certain breeds with particular shoulder conformation or working roles—including retrievers, working spaniels, and some agility dogs—may be more likely to develop tendon problems in this area. The condition often emerges gradually in response to repeated loading of the shoulder during activities such as jumping, swimming, or pulling, rather than from a single incident.
The course can vary considerably between individuals. In some dogs, early tendon irritation may settle with reduced activity and the lameness may resolve or become intermittent. In others, ongoing strain or incomplete healing can lead to progressive tendon breakdown, with fibres fraying or partial tears developing over months or years. Some animals show a slow worsening of signs, while others experience episodes of more pronounced lameness interspersed with quieter periods.
Signals & patterns
Early signals
Intermittent front-leg lameness
The dog may favour one front leg on some days but appear sound on others, particularly after periods of rest or following exercise. This inconsistency can make it difficult to pinpoint when the problem began.
Stiffness after lying down
The affected limb may appear stiff or held slightly differently when the dog first stands up, with the gait often improving after a few minutes of movement. This pattern reflects temporary discomfort as the shoulder structures warm up.
Reluctance to jump or climb
The dog may hesitate before jumping into the car, onto furniture, or up steps, or may decline activities that were previously routine. This change in behaviour often reflects discomfort when the shoulder is loaded at particular angles.
Subtle weight shift
When standing still, the dog may place slightly less weight through one front leg, or shift weight backwards onto the hind limbs. This can be a quiet sign of ongoing discomfort that the owner notices over time.
Later signals
Persistent lameness
The limp becomes more constant and may no longer improve with rest or worsen predictably with exercise. This suggests more significant tendon damage or ongoing inflammation that is not resolving.
Muscle wasting over the shoulder
The muscles around the affected shoulder may appear smaller or less defined compared to the other side, reflecting reduced use of the limb over weeks or months. This atrophy can become quite visible in lean dogs.
Altered gait pattern
The dog may develop a more pronounced head-bob when walking, or may adjust the arc and reach of the affected leg to avoid certain positions. These compensations can place additional strain on other joints over time.
Click to read about the biological mechanisms
How this is usually investigated
Options & trade-offs
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