When Pain Hides in Plain Sight: Why Clients Still Miss Subtle Canine Pain Signals

A recent study published in PLOS ONE (Gardeweg et al., 2026) takes a closer look at something every veterinarian encounters daily: the gap between what dogs feel and what owners recognize. While overt lameness or vocalization rarely goes unnoticed, this research highlights a more concerning issue—subtle pain behaviors are still flying under the radar, even among experienced dog owners.

The study evaluated 647 participants, including both dog owners and non-owners, asking them to assess 17 behavioral signs and interpret three clinical case scenarios. What emerged is both unsurprising and clinically important: people are reasonably good at identifying obvious pain—but struggle when it comes to the quieter signals.

Overt pain, such as limping or holding up a limb, was correctly identified by nearly all participants. Dog owners performed slightly better than non-owners, reinforcing the idea that experience does help—but only to a point. When pain is visible and movement-related, recognition is high and consistent.

However, the picture changes dramatically when pain becomes subtle.

Behaviors like reduced play, mood changes, or altered personality were more likely to be recognized as pain-related. But more nuanced indicators—such as yawning, nose licking, or air sniffing—were consistently rated as unlikely to be associated with pain. Even more striking, behaviors like “turning away” or “freezing” were less often interpreted as pain by dog owners than by non-owners, suggesting that familiarity may sometimes bias interpretation toward stress or training issues rather than discomfort.

This has real clinical implications. Subtle pain often precedes overt pathology, especially in chronic conditions such as osteoarthritis or low-grade inflammatory disease. If these early signs are dismissed or misattributed, intervention is delayed—and welfare suffers.

Perhaps the most revealing finding is that dog ownership alone does not significantly improve recognition of subtle pain. In fact, for one of the subtle case scenarios—featuring behaviors like increased attachment, restlessness at night, and reduced activity—owners and non-owners performed equally. This suggests that day-to-day exposure to dogs does not necessarily translate into better clinical insight.

What did make a difference was experience with pain—either personal or through a pet. Participants who had previously experienced pain themselves, or had cared for a dog through a painful condition, were significantly more likely to recognize subtle pain indicators. This reinforces a key concept: pain literacy is learned, not assumed.

For veterinarians, this study underscores a familiar but often underestimated challenge—client education. Owners may misinterpret early pain signs as behavioral quirks, aging, or even training problems. A dog that becomes clingy, restless at night, or less enthusiastic about walks may not trigger concern, yet these are precisely the patients we need to identify sooner.

The findings also highlight a potential communication gap. Many subtle pain behaviors overlap with stress or fear signals, and owners may already have a framework for interpreting them in that context. Without clear guidance, pain simply isn’t part of the differential diagnosis in the client’s mind.

This is where veterinary teams can make a measurable impact. Consultations for routine care, chronic disease management, or even behavioral concerns present opportunities to reframe how owners interpret their dog’s behavior. Explaining that pain does not always look like limping—and may instead present as withdrawal, irritability, or sleep disturbance—can shift awareness in meaningful ways.

Importantly, the study also suggests that education should not just list pain signs, but contextualize them. Helping owners understand that behaviors can have multiple underlying causes—including pain—may reduce misinterpretation and encourage earlier presentation.

In a profession increasingly focused on welfare and quality of life, recognizing pain early is critical. This research reminds us that while veterinary medicine has advanced in diagnostics and treatment, the first step—recognition—often still depends on the human at the other end of the leash.

And right now, that step is where we’re still falling short.