Can Dogs Cry? Interpreting Tears in Dogs Correctly
Updated September 2026
Glossy eyes, a moist look upward - sometimes it seems as if a dog is crying with emotion. Dogs really do have tears. What they don't do with them is cry emotionally like in a movie.
In short: Dogs produce tear fluid, but not as an expression of sadness or emotion, rather as a purely mechanical protective mechanism for the eye. Increased tearing, medically called epiphora, usually has harmless triggers like wind, dust, or drafts – but can also point to conjunctivitis, blocked tear ducts, or other eye conditions. With persistent, one-sided, or changed tearing, the eye should be examined by a vet.
What tears in dogs are actually for
Tear fluid has the same basic function in dogs as in humans: it keeps the eye surface moist, flushes out dust and small foreign bodies, and protects the cornea from drying out. Without this constant, usually invisible tear film, the eye would quickly become irritated and prone to injury.
Tearing only becomes visible once more fluid is produced than can drain through the tear-nose duct, or when this duct is blocked or narrowed. The medical term for this is epiphora – excessive, visible tearing.
Harmless triggers for watery eyes
Not every instance of tearing is an alarm signal. Common, harmless triggers include drafts, wind, dust, pollen, or dry heating air – similar to humans. Hair getting into the eye or a slightly misaligned eyelash can also cause temporarily increased tearing without a serious condition behind it.
Certain breeds with very round heads, short noses, and large, protruding eyes are also anatomically prone to more frequent tearing, because the tear-nose duct works less efficiently in them.
When watery eyes should be checked by a vet
It looks different when other symptoms come with the tearing. These include mucus-like or yellowish-greenish discharge, redness, frequent squinting, pawing at the eye, marked light sensitivity, or a sudden, one-sided, clearly increased tear flow. Such signs can point to conjunctivitis, a corneal injury, a foreign body, or a blocked tear duct.
If tearing lasts longer than one to two days or worsens, a vet should examine the eye. With chronic, untreated tearing, a permanent, brownish-stained "tear stain" can also form in the fur, which in turn can irritate the skin.
| Sign | More likely harmless | More likely needs checking |
|---|---|---|
| Discharge | Clear, watery | Mucus-like, yellowish or greenish |
| Duration | Short-term, after wind or dust | Persisting longer than 1-2 days |
| Behavior | No blinking, no squinting | Squinting, pawing at the eye |
| Sidedness | Bilateral, mild | Sudden one-sided, clearly increased |
I don't believe in prematurely interpreting watery eyes as "touching" or emotional. A dog expresses feelings through posture, facial expression, voice, and behavior – not through tear fluid. Anyone who romanticizes watery eyes risks overlooking a medical signal.
How do dogs show emotions instead?
Dogs express emotional states through body language: ear position, tail carriage, eye contact, vocalization, and muscle tension give far more reliable clues to a dog's state than the condition of their eyes. Anyone who knows their dog's behavior well recognizes joy, insecurity, or stress much earlier through these signals than through watery eyes.
FAQ about tears in dogs
Do dogs cry for emotional reasons?
No, there is no scientific confirmation of emotional crying in dogs. Tear fluid serves exclusively to protect the eye.
What does epiphora mean in dogs?
Epiphora refers to excessive, visible tearing, usually because too much tear fluid is produced or drainage is impaired.
Which dog breeds are especially prone to watery eyes?
Breeds with short noses and large, protruding eyes such as pugs, chihuahuas, or shih tzus are anatomically more prone to tearing.
When should I take watery eyes to the vet?
With mucus-like or yellowish discharge, redness, squinting, clearly one-sided tearing, or if the symptom lasts longer than one to two days.
Can I treat watery eyes myself?
For harmless, short-term triggers, gently cleaning with a clean, damp cloth per eye is often enough. With persistent or changed discharge, the cause should be checked by a vet rather than treated yourself.
What is a tear stain?
A brownish-reddish discoloration of the fur below the eyes caused by ongoing tearing, particularly noticeable on light-colored fur.
Kathrin is the founder of Dogvanture and writes here about nutrition, behavior, and everyday life with a dog – honestly, without jargon. This article does not replace veterinary advice.
Sources: Tiermedizinportal, fellomed, and MyPet: specialist articles on epiphora (eye discharge) in dogs, causes, and diagnostics.