Why Puppy Dog Eyes Affect Us—and What They Don't Prove

Author

Luboslav

Published

October 5, 2026

Reading time

5 min read

Topics

ContextObservation Method

Your dog looks up as you finish lunch, and the inner eyebrows rise. The face is difficult to resist. It is tempting to jump from that feeling to a complete explanation: the dog knows precisely how to manipulate you. Research gives us a more interesting picture, involving anatomy, the circumstances of the movement and the way people respond.

Three questions need to stay separate. What allows the brows to move? When does the dog make the movement? And does it influence a human observer? Evidence addressing one question does not automatically answer the other two.

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Anatomy helps explain the expression

Kaminski and colleagues' 2019 study compared facial dissections from six domestic dogs and four gray wolves. The main differences were around the eyes. A distinct inner-brow-raising muscle was characteristic of the dog sample, while the corresponding region in wolves was poorly developed or not separated in the same way. A behavioral comparison involving 27 dogs and nine wolves found more frequent and intense inner-brow raising in dogs. [S1]

The authors proposed that human preferences could have favored expressive brows during domestication. That is an evolutionary interpretation of comparative findings, not evidence that a dog consciously chooses a sentimental expression. The anatomical sample was small; it should not be used to assign an identical facial capacity to every breed or individual. [S1]

A shelter study found an association, not a guaranteed effect

Waller and colleagues filmed dogs during a two-minute first interaction with a researcher at rehoming shelters. Their final analysis included 27 dogs from a broadly similar breed group. More frequent inner-brow raising was associated with fewer days before rehoming. [S2]

This observational design did not randomly assign expressions or demonstrate that brow movements caused adoption. The authors also warned that their exploratory associations would not remain significant under a correction for multiple comparisons. The result is a reason to investigate human responses, not a promise that a particular expression wins people over or evidence that dogs know the result it will produce. [S2]

A later experiment complicates the communication story

Bremhorst and colleagues tested 21 pet dogs, mainly Labradors. Dogs expected food or a toy from an apparatus, either from a visible person or through remote delivery without a person inside. Contrary to the researchers' prediction, inner-brow raising occurred more often in the non-social condition. Analysis of a video subsample found a strong association between the brow movement and movements of the eyes. [S3]

The researchers suggested a lower-level explanation connected to looking around. Their findings challenge treating every brow raise as a signal directed at a person. They do not establish that dogs never communicate visually; the breed selection and reward-waiting setup also limit generalization. This is why one appealing photograph cannot settle the function of the movement. [S3]

An owner's response and a dog's intention are different evidence

You can be moved by an expression without knowing how or why it occurred. A face that looks pleading to you may appear while the dog is tracking your hand, looking toward a plate or waiting in a familiar place. Those observations are available to an owner. A detailed account of the dog's private strategy is not.

Consider an illustrative lunch routine. On several afternoons, a person gives the dog food after looking down and meeting their gaze. It would be reasonable to ask whether the routine helps maintain waiting near the table. It would not be reasonable to treat the sequence as proof that the dog understands human sadness, performs it deliberately and predicts exactly how much food the person will surrender.

Use a clear routine instead of arguing with a facial expression

If the lunchtime interaction is inconvenient, decide what you want the routine to be before the appealing face appears. A dog-safe activity or comfortable nearby resting space may fit your household better than unpredictable scraps. The practical aim is consistency, rather than suppressing a normal facial movement or testing how persuasive the dog can become.

Another illustrative situation is different: the brow changes while your dog follows a toy moving across the room. Watch the direction of the eyes and the wider action instead of treating the movement as a request for food. You can notice the same visible feature in different sequences without assigning it one fixed message.

If a moment interests you, describe what happened before the expression and what followed. Was a person already offering attention, or did they notice the dog afterwards? Was the dog following something moving? Keep the circumstances ordinary: there is no need to withhold food or manufacture frustration to obtain a more dramatic face.

When you describe the moment, keep the claims in proportion: 'raised the inner brows while watching my hand' is an observation; 'made me feel protective' reports your reaction; 'planned to manipulate me' is an interpretation. The distinction lets you enjoy the expression while staying honest about the evidence. Puppy dog eyes can remain charming without becoming a universal decoder of canine intention.

For a concise way to record your own observations, use the Dog Behavior Context Checklist.

Sources

[S1] Kaminski, J., Waller, B. M., Diogo, R., Hartstone-Rose, A., & Burrows, A. M. (2019). Evolution of facial muscle anatomy in dogs. Proceedings of the National Academy of Sciences, 116(29), 14677–14681. doi:10.1073/pnas.1820653116.

[S2] Waller, B. M., Peirce, K., Caeiro, C. C., Scheider, L., Burrows, A. M., McCune, S., & Kaminski, J. (2013). Paedomorphic Facial Expressions Give Dogs a Selective Advantage. PLOS ONE, 8(12), e82686. doi:10.1371/journal.pone.0082686.

[S3] Bremhorst, A., Mills, D. S., Stolzlechner, L., Würbel, H., & Riemer, S. (2021). 'Puppy Dog Eyes' Are Associated With Eye Movements, Not Communication. Frontiers in Psychology, 12, 568935. doi:10.3389/fpsyg.2021.568935.