Why Dogs Make a Sad Face

ImmunityQ&AMeongsiljang Veterinary Advisory Board

A dog’s sad expression can be a sign of emotion or a signal of pain or illness. Let’s uncover the hidden meaning behind the expression.

Why Dogs Make a Sad Face

A puppy lifting its inner eyebrows to make a sad expression.

A dog’s sad expression is a facial signal created by raising the inner eyebrow muscles to make the eyes appear larger. The key is distinguishing between emotional distress and pain. While it may simply be a bid for attention, if this look is accompanied by other symptoms such as decreased appetite, lethargy, or trembling, it could indicate an underlying medical issue. If these signs persist for more than 24 hours, please consult your veterinarian.

Why Do Dogs Make a Sad Face?

Dogs often raise the inner corners of their eyebrows, making their eyes appear larger. While this facial expression is commonly interpreted as a social gesture to attract their owner’s attention, there is currently no medically validated “facial pain scale” specifically designed for dogs. However, subtle changes in facial expressions are known to be more reliable indicators of an animal’s emotional state and pain than vocalizations or movement. Since pain is an unpleasant emotional experience, it can be difficult to detect in dogs and easy to confuse with other behaviors. Therefore, rather than jumping to conclusions based on a single expression, it’s important to carefully consider the context and accompanying behaviors to determine whether the expression reflects simple emotion or signals pain or anxiety.

Emotional Signals vs. Pain and Illness Signals

Item	Emotional Signal	Pain Signal	Illness Signal
Situation	When asking for food or a walk	When a specific area is touched	Persistent during normal daily life
Duration	Within a few minutes	A few hours to a day	24 hours or more
Accompanying symptoms	Tail wagging	Cowering, trembling	Loss of appetite, lethargy
Response	Routine response	Vet check recommended	See vet immediately

Judge by the overall behavioral context, not just a single facial expression.

Signals to Watch for Along with a Sad Face

Don’t rely on facial expressions alone; observe your pet’s entire body for signals.

Changes in appetite: Refusing favorite treats may indicate pain.

Decreased energy: Reluctance to walk or difficulty standing up.

Posture changes: Arching the back or holding one leg up.

Abnormal breathing: Labored breathing even at rest.

Changes in personality or behavior: Becoming more withdrawn than usual, or showing sensitivity or aggression when touched.

Please note that a dry nose or warm ears alone cannot accurately indicate fever or illness. Body temperature should be measured precisely at a veterinary clinic. If two or more of the above signs appear together, it may not simply be an emotional response.

A beagle resting in a hunched, curled-up posture

When to Seek Immediate Veterinary Care

If your dog shows a sad expression along with any of the following symptoms, seek veterinary care immediately: loss of appetite lasting more than 24 hours, recurrent vomiting or diarrhea, difficulty breathing, hiding or avoiding contact with you, or increased sensitivity or aggression when touched. Keep in mind that dogs often mask pain, and it’s difficult to accurately gauge its severity based on facial expressions alone. Therefore, monitor changes in appetite, behavior, and posture in addition to facial cues, and if you have any concerns, it’s safest to have your dog evaluated by a veterinarian.

Dogs’ Habit of Hiding Pain

Dogs have a natural instinct to hide their vulnerabilities. According to veterinary internal medicine textbooks, by the time owners notice signs of chronic pain, the condition is often already quite advanced. Therefore, it's important not to overlook subtle signals such as sad expressions, changes in their eyes, or slight shifts in posture. Keeping photos or videos of your dog's usual demeanor can make it easier to spot changes over time.

An elderly small-breed dog sitting quietly by the window

Observation and Response at Home

If your pet’s sad expression persists, follow these steps to investigate: 1. Check the environment: Look for stressors such as new furniture, noise, or unfamiliar visitors. 2. Perform a physical check: Gently touch the ears, mouth, and joints to observe any reactions. 3. Keep a daily log: Record food intake, elimination habits, and walk duration for at least three days. 4. Compare expressions: Compare current facial expressions with photos from when your pet was feeling well. 5. Consult a veterinarian: If you notice any changes, contact your vet and share the photos along with your observations.

Conditions Easily Mistaken for Emotional Expressions

A wide-eyed or sad-looking expression may actually be a sign of an underlying medical condition. For example, glaucoma can present with excessive tearing, eye pain, corneal clouding, dilated pupils, and squinting (blepharospasm). However, these symptoms can also occur with other eye diseases, so a diagnosis cannot be made based on appearance alone; tests such as intraocular pressure measurement are necessary. Additionally, facial pain or systemic illnesses can also cause changes in facial expression. Therefore, pet owners should not dismiss these signs as merely "being in a bad mood." If changes in expression persist, please have your pet examined at a veterinary clinic.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

My dog looks sad whenever it sees me. Is it stressed?

Not necessarily. It’s likely a social behavior aimed at gaining your attention. However, if your pet’s demeanor doesn’t improve after meals, walks, or affectionate interaction, check for other signs that may indicate an underlying issue.

Do certain breeds tend to show a sadder expression more prominently?

Yes, breeds with loose skin around the eyes, such as Beagles, Basset Hounds, and Bulldogs, often have a naturally sad-looking expression due to their facial structure. In these cases, it's important to consider their usual expression as the baseline.

What should I do if my pet looks sad and refuses to eat?

If your pet refuses to eat for more than 24 hours, or if vomiting or diarrhea is present, you should seek veterinary care immediately. This is especially urgent for small-breed and senior dogs, as they are at higher risk of hypoglycemia and require prompt intervention.

How can I help my pet relax and ease the sad expression caused by stress?

Short, gentle walks, nose work, and access to a quiet resting area can be helpful. If there have been changes in your pet’s environment, it may take two to three days for them to readjust to their usual routine.

What are the benefits of taking photos?

This gives you a baseline to compare your pet’s usual expression against. Since veterinarians can use the timing of changes in diagnosis, we recommend regularly taking photos from the same angle.