Dogs “cry” in two distinct ways: they vocalize through whining, whimpering, and howling, and their eyes produce tears that can sometimes overflow. The reasons behind each are quite different. Vocal crying is almost always emotional or communicative, while watery eyes are usually physical. Understanding which type of crying your dog is doing tells you a lot about what they need.
What Dogs Mean When They Whine
When most people say their dog is “crying,” they mean the high-pitched whining, whimpering, or soft howling that dogs use to communicate. Unlike human crying, which often signals sadness, dog vocalizations serve a wider range of purposes. Dogs most commonly whine when they want attention, feel excited, are anxious, or are trying to show submission to a person or another dog.
Excitement whining is one of the most familiar forms. Many dogs whine and wiggle during greetings, especially when their owner comes home. This isn’t distress. It’s the canine equivalent of shouting with joy. You’ll notice the tail wagging, the body loose and wiggly, and sometimes a full-body spin alongside the vocalizing.
Attention-seeking whining is exactly what it sounds like: your dog has learned that making noise gets a response. They might whine when they want food, a walk, or simply to be acknowledged. If you’ve ever given in to a whining dog and handed over a treat, you’ve reinforced the behavior, and your dog knows it.
Appeasement whining looks different from the rest. A dog doing this will tuck their tail, lower their body, avert their gaze, and whimper softly. It’s a signal that says “I’m not a threat” and typically happens when a dog feels intimidated by a person, another animal, or even just a stern tone of voice.
Pain-related whining is another category entirely. Dogs often vocalize in response to injury or a painful condition, and this type of crying can come on suddenly or increase when a specific body part is touched or when the dog moves in a certain way.
Separation Anxiety and Vocal Distress
One of the most intense forms of dog crying happens when owners leave. Dogs with separation anxiety engage in excessive vocalization, including sustained whining, barking, and howling, sometimes for long stretches while alone. This behavior causes real distress for the dog and is one of the most common reasons dogs are surrendered to shelters.
The timing is telling. Research shows that separation-related vocalization peaks almost immediately after an owner leaves, with an average latency of just 3.25 minutes. If a dog were simply bored, you’d expect the behavior to build gradually over time. Instead, the intensity spikes right at the start, which strongly suggests genuine anxiety rather than restlessness. Some dogs begin whining, pacing, panting, or freezing even before their owner walks out the door, picking up on cues like grabbing keys or putting on shoes.
Separation anxiety often comes paired with destructive behavior, and both tend to occur in that same narrow window after departure. If your dog only cries when you’re leaving or gone, that pattern points clearly toward anxiety rather than a general behavioral issue.
Can Dogs Cry Real Tears?
For a long time, the answer from scientists was a flat no: dogs produce tears to lubricate their eyes, but not from emotion. That changed in 2022 when researchers at Azabu University in Japan published a study that surprised the field. They measured tear volume in dogs during reunions with their owners and found a significant increase in tear production when dogs were reunited with their owners, but not when they met a familiar person who wasn’t their owner.
The key mechanism appears to be oxytocin, sometimes called the “bonding hormone.” When researchers applied an oxytocin solution directly to dogs’ eyes, tear volume increased in a similar way. This suggests that the surge of oxytocin a dog experiences upon seeing their owner may directly trigger tear production. The researchers proposed this could be the first evidence of emotional crying in a non-human animal, and that visible tears in a dog’s eyes might actually strengthen the emotional bond between dogs and their people.
This doesn’t mean your dog sobs when they’re sad. The tear increase was modest and linked specifically to positive reunions, not to grief or pain. So while dogs may technically produce emotion-linked tears, it looks nothing like human crying and happens in a very narrow context.
Medical Reasons for Watery Eyes
If your dog’s eyes are consistently teary, wet, or producing visible discharge, the cause is almost certainly physical rather than emotional. Excessive tearing in dogs, known clinically as epiphora, has a long list of potential triggers. Common causes include conjunctivitis (from bacteria or viruses), allergies, corneal ulcers, eye injuries, abnormal eyelash growth, infections, and glaucoma. Structural problems with the eyelids can also be responsible: eyelids that roll inward press lashes against the eye’s surface, while eyelids that roll outward expose tissue that should be protected.
The color and consistency of the discharge matters. Clear, watery tears often point to irritation or allergies. Thick, yellow, or green discharge suggests infection. Reddish-brown staining beneath the eyes, especially in lighter-coated dogs, usually indicates chronic overflow rather than an acute problem.
Flat-Faced Breeds and Eye Problems
Brachycephalic breeds like Pugs, French Bulldogs, Shih Tzus, and English Bulldogs are significantly more prone to watery eyes. Their shortened skulls change the geometry of the eye socket, tear ducts, and surrounding tissue in ways that create a cascade of problems. Hairs growing from the inner corner of the eye can touch the eye’s surface, causing constant irritation. Those same hairs can also wick tear fluid away from the drainage system, leading to overflow down the face. Abnormal eyelash growth, where lashes sprout from unusual locations or in unusual directions, is also common in these breeds.
If you own a flat-faced breed and notice persistent tearing, it’s worth having a vet evaluate whether the cause is structural. Some of these issues are manageable with routine care, while others benefit from minor corrective procedures.
Signs That Tearing Needs Attention
Not all watery eyes are an emergency, but certain combinations of symptoms signal something serious. Watch for squinting or holding one eye shut, which indicates pain. Swelling around the eye or eyelid, cloudy or hazy appearance to the eye itself, visible redness in the white of the eye, and sensitivity to light are all signs that something more than mild irritation is going on. A sudden change in the eye’s appearance, any change in your dog’s vision (bumping into things, hesitating at stairs), or an eye that looks like it’s bulging or sunken compared to the other side all warrant prompt veterinary evaluation.
Corneal ulcers deserve special mention because they’re common and can worsen quickly. A dog with a corneal ulcer will typically squint, tear excessively, and avoid bright light. The eye may appear swollen, and you might notice a rough or slightly depressed spot on the surface of the eye if the ulcer is large enough. Left untreated, ulcers can deepen and threaten vision.
How to Tell What Your Dog’s Crying Means
Context is everything. A dog whining at the front door when you grab your keys is anxious. A dog whining with a wagging tail when you walk in is excited. A dog whining while licking a paw or limping is likely in pain. And a dog with wet, teary eyes but no vocalizing at all probably has an eye issue, not an emotional one.
Pay attention to when the behavior happens, what else your dog is doing with their body, and whether there are any accompanying physical symptoms. Dogs are remarkably expressive animals, but their signals don’t always map neatly onto human emotions. A “crying” dog isn’t necessarily sad. They might be thrilled to see you, nervous about a thunderstorm, asking for dinner, or dealing with an irritated eye. Reading the full picture, not just the sound or the tears, is how you figure out what they actually need.