Images are AI-generated illustrations, not clinical photographs or recorded eye movements. They cannot establish duration, cause, emotional meaning or eye health. The comparison panels are not consecutive video frames; notebook prompts are examples.
You are sitting beside your dog when one eye briefly closes. It looks remarkably like a wink—and it is tempting to imagine a private joke between you.
Why does my dog wink at me? A single movement cannot reveal the reason. It might be a brief eyelid movement, a response to irritation, or part of an interaction whose meaning is unclear. Research on ordinary blinking offers interesting clues, but it does not translate a one-eyed wink into “I love you.” Start by noticing whether the eye reopens normally and whether anything else has changed.
Wink, Blink, or Squint?
These everyday descriptions help explain what you noticed; they are not diagnoses.
A blink generally involves both eyes closing and reopening. Blinking helps protect and moisten the eye surface. Its frequency can also vary with the social situation, as recent research explores.
A wink describes one eye closing briefly while the other remains open. That tells you what moved, not why. Seeing it during a friendly moment does not establish that your dog intended a friendly message.
Squinting or holding an eye closed deserves different attention, especially if it repeats or comes with rubbing, redness or discharge. VCA’s guide to eyelid inflammation describes spasmodic blinking, called blepharospasm, among possible signs of eyelid problems. Do not label every brief closure a spasm—or dismiss an ongoing change as a cute habit.
There is no reliable “one or two winks means harmless” rule. A photograph cannot confirm that an eye is comfortable or healthy.
Do Dogs Wink on Purpose?
The careful answer is that current blinking studies do not establish deliberate, human-style one-eyed messages. That is different from proving dogs can never learn such a movement.
In a 2025 study involving 54 dogs, researchers showed videos of other dogs blinking, licking their noses or looking attentively. The dogs blinked more during the blinking videos than during the nose-licking videos. This suggests a possible social role, but it does not decode spontaneous winking at an owner.
A 2026 University of Parma research report describes a separate study of 35 dogs watching human videos. Blink rate increased when the person blinking was their owner; the same effect was not observed with strangers. Researchers did not find the dogs synchronizing their blinks with the person.
The findings leave several possibilities open. They do not demonstrate intentional imitation, a specific emotional message, or a proven unconscious mechanism. Ordinary blinking and a one-eyed wink should not be treated as interchangeable evidence.
Does Dog Winking Mean Love—or a Learned Habit?
It is understandable to connect an expression with your relationship. Still, one eyelid movement is not a stand-alone measure of affection, trust or submission. Cat slow-blink findings should not be used as evidence for dogs either.
A learned response is a possibility worth discussing cautiously: if a movement repeatedly receives attention, it might become part of an interaction. The blinking studies above did not test whether owners’ laughter or treats teach one-eyed winking. They cannot confirm that explanation for your dog.
For a broader look at everyday interaction, read how dogs show affection. Our guide to why dogs stare at their owners also considers context rather than assigning one meaning to every look.
When to Contact Your Vet
PDSA advises contacting a vet promptly when a dog blinks more than usual or appears to have a painful eye. Mention repeated squinting, rubbing, redness, swelling, unusual tearing or discharge, cloudiness, or changes in vision. Seek urgent help for an injury, sudden vision changes or severe pain.
Do not wait for every sign to appear. Avoid using human or leftover eye medication unless your vet directs it, and do not touch the eye or pull out hairs to investigate. Similar-looking changes can have different causes requiring an examination.
If you can capture a short video without disturbing your dog, it may help describe the movement. Recording should never delay contacting the clinic.
Frequently Asked Questions
Why Do Dogs Wink at Their Owners?
There is no single established explanation. The movement, its context and any accompanying eye changes matter. A wink alone does not prove affection or intentional communication.
Are Dogs Copying Us When They Wink Back?
That has not been established. The 2026 study found changes in ordinary blink rate, not evidence of deliberate one-eyed imitation or synchronized responses.
How Can I Tell a Wink From Painful Squinting?
You cannot diagnose the cause at home. Repeated closure, an eye held shut, rubbing or visible changes warrant veterinary advice rather than a behavioral interpretation.
Can I Photograph My Dog’s Wink for a Portrait?
Save spontaneous moments without trying to provoke eye movements. For a reference showing their usual appearance, follow our pet portrait photo guide. A familiar, comfortable expression can inspire a PetPortraArt custom portrait; eye concerns come first.