Why Is My Dog Panting So Much? Causes and What to Do

You’ve probably found yourself wondering “why is my dog panting so much” at some point, especially if the panting seems heavier, more frequent, or happens at unexpected times. The good news is that panting is completely normal for dogs in many situations. The not-so-good news is that excessive panting can sometimes signal something that needs attention.

Here’s how to tell the difference between normal panting and a sign that something’s wrong, and what to do about it.

Normal Panting vs Excessive Panting: How to Tell the Difference

Dogs don’t sweat like humans. Their primary cooling mechanism is panting, drawing cool air over the moist surfaces of the tongue and respiratory tract to evaporate heat. So some panting is not just normal, it’s essential.

Normal panting looks like:

• Moderate, rhythmic breathing after exercise or play
• Open mouth with tongue relaxed and slightly extended
• Settles down within 5-10 minutes of resting in a cool place
• Occurs in warm weather or after excitement
• Dog is otherwise happy and behaving normally

Excessive or concerning panting looks like:

• Heavier, faster, or louder than usual
• Occurs at rest with no obvious trigger
• Doesn’t settle after cooling down or resting
• Accompanied by restlessness, pacing, or inability to get comfortable
• Dog seems distressed, anxious, or in pain
• Accompanied by other symptoms (coughing, drooling, lethargy, changes in appetite)

The key question to ask yourself is: is there an obvious reason for this panting? If your dog just ran around the park on a warm day, panting is expected. If your dog is panting heavily while lying on the sofa on a cool evening, that’s worth investigating.

Common Causes of Excessive Panting

Heat and Overheating

The most straightforward cause. Dogs pant more as the temperature rises. But there’s a spectrum between normal heat-related panting and dangerous overheating:

• Normal: moderate panting on a warm day, settles in shade with water
• Overheating: heavy, rapid panting that doesn’t stop, drooling, red gums, lethargy
• Heat stroke: extreme panting, vomiting, collapse, purple gums, this is an emergency

Brachycephalic breeds (Bulldogs, Pugs, French Bulldogs, Shih Tzus) are especially vulnerable, as their shortened airways make cooling less efficient.

Exercise

Vigorous exercise naturally increases body temperature and breathing rate. Post-exercise panting should settle within 5-15 minutes of rest in a comfortable environment. If it persists longer, your dog may have overexerted themselves.

Stress and Anxiety

Panting is one of the most common signs of stress in dogs. Common triggers include:

• Thunderstorms and fireworks
• Separation anxiety
• Car journeys
• Vet visits
• New environments or unfamiliar people
• Changes in routine

Anxious panting is usually accompanied by other body language signals, yawning, lip licking, whale eye (showing the whites of the eyes), a tucked tail, trembling, or pacing.

Pain

Dogs are remarkably good at hiding pain, and panting is often one of the few visible signs. Pain-related panting may be:

• Constant or recurring without an obvious trigger
• Worse at night (when there are fewer distractions)
• Accompanied by reluctance to move, eat, or be touched in certain areas
• Present alongside limping, stiffness, or changes in posture

If you suspect pain, see your vet. Common culprits include arthritis (especially in older dogs), dental problems, abdominal pain, and injuries.

Medical Conditions

Several medical conditions can cause excessive panting:

• Cushing’s disease (hyperadrenocorticism): overproduction of cortisol. Often causes panting, increased thirst and urination, a pot-bellied appearance, and hair loss. More common in middle-aged to older dogs.
• Heart disease: the heart struggles to pump blood efficiently, reducing oxygen delivery. The dog pants to compensate. May be accompanied by coughing, exercise intolerance, and lethargy.
• Respiratory conditions: laryngeal paralysis, pneumonia, tracheal collapse, and other airway issues cause laboured breathing and panting.
• Anaemia: reduced red blood cells mean less oxygen is carried to tissues. The dog pants to increase oxygen intake.
• Fever: dogs may pant when running a temperature, even if the environment is cool.

Warning Signs That Mean You Should See a Vet

While not every episode of panting requires a vet visit, certain combinations of symptoms do. See your vet if your dog’s panting is accompanied by:

• No clear trigger: panting at rest, in a cool environment, without recent exercise
• Changes in gum colour: pale, white, blue, or purple gums indicate poor oxygenation
• Coughing: especially a persistent cough or one that worsens at night
• Lethargy or collapse: your dog seems weak, unsteady, or loses consciousness
• Loss of appetite or weight loss: especially if gradual over weeks
• Increased thirst and urination: a hallmark of Cushing’s disease and other hormonal conditions
• Abdominal swelling: as noted above, this is an emergency
• Changes in breathing pattern: laboured breathing, wheezing, or unusual noises

When in doubt, call your vet. They would always rather hear from a cautious owner than see a dog that’s been unwell for weeks without attention.

How to Help an Anxious, Panting Dog

If your dog’s excessive panting is driven by anxiety, there are several approaches that can help:

Environmental management:

• Create a safe space, a quiet room, a covered crate, or a familiar bed where your dog can retreat
• Use white noise or calming music to mask scary sounds
• Close curtains during fireworks or storms

Calming products:

• Pressure wraps (like ThunderShirts), many owners report these help during storms and fireworks
• Adaptil diffusers or sprays, these release a synthetic version of the calming pheromone produced by nursing dogs
• Calming supplements, products containing L-theanine, casein, or tryptophan may help. Discuss options with your vet

Behavioural support:

• Desensitisation training, gradually exposing your dog to triggers at low intensity and pairing them with positive experiences
• A qualified behaviourist can create a tailored plan for separation anxiety or noise phobias
• Your vet may recommend anti-anxiety medication for severe cases

When Panting Is Just Panting

It’s worth remembering that many dogs simply pant more than others. Larger breeds, overweight dogs, and brachycephalic breeds tend to pant more as a baseline. Some dogs pant when they’re excited, happy, or anticipating something good (like dinner or a walk).

If your dog has always been a heavy panter, is otherwise healthy, and your vet hasn’t identified any concerns, it’s likely just their normal. The key is knowing what’s normal for your dog so you can spot when something changes.

A sudden increase in panting, or panting in new contexts, is always worth paying attention to, even if there’s often a benign explanation.