Why Do Dogs Wink? What Your Frenchie Is Telling You

The French Bulldog wink is one of the most-searched Frenchie topics online, and with good reason: that brief, knowing half-close of one eye looks completely deliberate, like the dog is sharing a private joke with you. In most cases it is harmless, but understanding what is actually happening tells you when it matters and when you can simply enjoy the moment.

What is actually happening when a dog winks

Dogs have three eyelids in each eye: an upper lid, a lower lid and a third eyelid (the nictitating membrane), which sits in the inner corner of the eye and can sweep across the visible eye surface from inner to outer corner.

In humans and many other primates, the nictitating membrane has largely disappeared through evolution. In dogs, it is still present and functional. It contains a gland (the nictitans gland, also involved in cherry eye) that produces a portion of the dog’s tear film, and provides an additional layer of eye protection in rough or dusty environments.

When a dog appears to wink, the most common explanation is a brief, partial movement of this third eyelid, often combined with a slight relaxation of the eyelid muscle itself. It looks like a wink to us because it happens on one side and appears deliberate, but it is usually a reflex, not a choice.

Why French Bulldogs seem to do it more

Many Frenchie owners notice the wink more than owners of other breeds, and there is a structural reason for this. French Bulldogs have large, prominent eyes that protrude more from the orbital socket than in longer-nosed breeds. This means any movement of the third eyelid or eyelid muscle is more visible to an observer than it would be in a dog with deeper-set eyes.

The anatomical features of the brachycephalic face, the shallow orbit, the large globe (eyeball) and the relatively limited eyelid coverage, all make the eyes more exposed and the small movements that happen around them easier to see. This is part of why flat-faced breeds tend to generate more eye-related questions generally.

When winking is normal

The following scenarios represent normal, benign winking:

During relaxation or light sleep: The third eyelid often partially extends across the eye when the dog is drowsy. As the dog transitions between sleep states, the membrane may be briefly visible and then retract. This is normal and requires no action.

On waking: As the dog comes out of sleep, the third eyelid may sweep across the eye as part of the normal waking process. This often looks like a dramatic wink from the dog directly after opening its eyes.

Brief muscle twitches: Minor facial muscle activity, particularly in a dog that is resting but not fully asleep, can produce a brief one-sided eye movement that looks like a wink.

Attention-seeking or learned behaviour: Some dogs, particularly those who have received enthusiastic reactions to their winking from owners, appear to repeat the movement. The mechanism is still physical (the third eyelid or eyelid muscle), but the timing can become reinforced because it reliably gets a positive response.

When to have the eye checked

The following warrant a vet check, ideally within a day or two:

Persistent third eyelid visibility: If the third eyelid stays visible in the inner corner of the eye for extended periods rather than briefly appearing and retracting, this can be a sign of cherry eye (prolapse of the nictitans gland) or another issue. See the cherry eye guide for full details.

Winking accompanied by squinting or blinking: A dog that is repeatedly partially closing one or both eyes, particularly if one eye appears more closed than the other, may be indicating eye irritation or pain. This needs prompt assessment.

Winking with discharge: Clear watery discharge is often normal, particularly in a brachycephalic breed after exercise or in dusty conditions. Yellow, green or mucousy discharge, or any brown crusting around the eye, alongside winking suggests an infection or conjunctivitis.

Redness or obvious inflammation: A red, bloodshot eye alongside winking is not normal. Conjunctivitis, corneal scratches and other conditions can cause redness and associated eye movement.

The dog pawing at the eye: If the winking seems to be associated with the dog trying to rub or scratch the eye, the dog is almost certainly experiencing discomfort and needs veterinary assessment.

A pink or red mass in the inner corner: This is cherry eye, not winking. A visible, persistent rounded mass in the inner corner of the eye needs treatment, not monitoring.

Eye conditions to be aware of in French Bulldogs

Frenchies, as a brachycephalic breed, have elevated rates of eye conditions that owners should know to watch for:

Cherry eye: Prolapse of the nictitans gland, producing the characteristic pink mass in the inner corner. Treatable with surgery and best addressed early.

Corneal ulcers: Surface damage to the cornea, usually from trauma, infection or chronic irritation. Symptoms include squinting, excessive tearing, redness and pawing at the eye. A veterinary emergency.

Dry eye (keratoconjunctivitis sicca): Insufficient tear production leading to a chronically irritated, sticky-looking eye. More common in Frenchies with a history of cherry eye or older dogs.

Entropion: Rolling in of the eyelid, causing the eyelash or eyelid skin to rub against the eye surface. More common in lower lids. Causes chronic irritation and squinting.

Distichiasis: Eyelashes growing from abnormal positions and contacting the eye surface. Can cause mild to significant irritation.

Routine eye care, including keeping the eye area clean during grooming, recognising early signs of problems and what the daily eye check should include, is covered in the grooming guide.

For a full overview of French Bulldog eye conditions including symptoms, treatment and costs, see the eye problems guide. If the winking looks more like a behaviour than an eye issue, the behaviour guide covers the full range of Frenchie quirks, from the wink to the zoomies.