Dog Panting at Night: What’s Normal and When to Worry

By Dr Duncan Houston

Quick Answer

Dogs may pant at night because they are too warm, unsettled, in pain, anxious, or dealing with an underlying medical condition. Occasional panting after exercise or on a hot night can be normal, but repeated night-time panting without a clear reason should be investigated.

As a veterinarian, I pay close attention to night-time panting because it can be an early clue for pain, stress, heart or lung disease, hormonal problems, or age-related cognitive change.

If your dog seems calm during the day but starts panting, pacing, or acting restless once the house goes quiet, it is worth paying attention.

Sometimes the explanation is simple. Other times, night-time panting is your dog’s way of telling you something is wrong.

When Panting at Night Can Be Normal

There are situations where panting at night may not be a major concern.

These include:

• After heavy exercise in the evening

• On hot or humid nights

• After excitement or overstimulation before bed

• If the sleeping area feels stuffy or poorly ventilated

In these cases, the panting should settle once your dog cools down and relaxes.

When Night-Time Panting Is a Concern

Panting becomes more concerning when it:

• Happens several nights in a row

• Appears suddenly with no obvious cause

• Is paired with pacing, whining, trembling, or hiding

• Occurs in an older dog that did not previously do this

• Happens when the room is cool and your dog has not exercised

• Seems to be getting worse over time

If it feels unusual for your dog, it is worth taking seriously.

Common Causes of Dog Panting at Night

Anxiety or Stress

Some dogs become more unsettled at night, especially when the environment changes or external noises are more noticeable.

Possible triggers include:

• Separation anxiety once everyone goes to bed

• Storms, fireworks, or outside noises

• Travelling or sleeping in a new environment

• Changes in household routine

Anxious dogs may also pace, whine, seek reassurance, or struggle to settle.

Pain or Discomfort

Pain is one of the most overlooked causes of night-time panting.

Dogs with pain may pant more when they lie down, change positions repeatedly, or struggle to get comfortable.

Common causes include:

• Arthritis

• Back pain

• Abdominal discomfort

• Dental pain

• Injury or post-surgical discomfort

This is especially common in older dogs.

Heart or Lung Disease

Panting at night can sometimes be linked to breathing difficulty, especially when lying down.

Watch for signs such as:

• Increased breathing effort

• Coughing

• Exercise intolerance

• Restlessness when trying to sleep

• Needing to sit or stand rather than lie flat

These cases should be assessed promptly.

Cognitive Dysfunction

Older dogs can develop age-related cognitive decline, sometimes called canine cognitive dysfunction.

This can lead to:

• Night waking

• Pacing

• Panting

• Whining

• Seeming confused or lost in familiar places

If your senior dog is acting differently at night, cognitive change may be part of the picture.

Hormonal Conditions

Certain hormonal diseases can increase panting.

One of the classic examples is Cushing’s disease, which may also cause:

• Increased thirst

• Increased appetite

• Pot-bellied appearance

• Thinning coat

• Muscle loss

Hormonal issues often develop gradually, so owners may miss the pattern at first.

Heat or Poor Ventilation

Sometimes the answer is simply that your dog is too warm.

Dogs sleeping in:

• Warm bedrooms

• Humid spaces

• Thick bedding

• Poorly ventilated rooms

may pant at night even if they seem fine during the day.

What You Can Try at Home

If your dog is otherwise bright and stable, there are a few things you can do to help.

Cool the Sleeping Area

• Improve airflow with a fan or air conditioning

• Move bedding away from heat sources

• Offer a cooler sleeping surface

Keep a Consistent Night Routine

• Aim for a calm wind-down before bed

• Avoid late intense play sessions

• Keep bedtime predictable

Watch for Signs of Pain

Gently observe whether your dog:

• Hesitates to lie down

• Changes position often

• Struggles to stand up

• Reacts when certain areas are touched

Reduce Stress

A quiet, predictable environment can help anxious dogs settle more easily.

Record What Happens

Take note of:

• What time the panting starts

• How long it lasts

• Whether pacing or whining happens too

• Room temperature

• Any coughing, weakness, or other changes

Patterns are often very helpful.

When to See a Vet

Book a veterinary check if:

• Panting happens frequently or is worsening

• Your dog seems distressed or cannot settle

• There are signs of pain

• Your dog is older and this is new

• Panting is paired with coughing, weakness, vomiting, collapse, or weight loss

• You are unsure whether the cause is behavioural or medical

New or unexplained night-time panting should not just be brushed off.

What Your Vet May Check

Depending on the history and examination findings, your vet may recommend:

Physical Examination

A thorough exam can help identify pain, arthritis, dental disease, fever, heart murmurs, or breathing abnormalities.

Blood Tests

These can help assess organ function and look for problems such as hormonal disease or systemic illness.

X-rays

Chest or joint x-rays may be useful if heart disease, lung disease, or arthritis is suspected.

Further Testing

Additional investigations may be recommended depending on the suspected cause.

Final Thoughts

Night-time panting in dogs is sometimes harmless, but not always.

If your dog is hot after exercise, the explanation may be simple. But if the panting is repeated, unexplained, or associated with pacing, discomfort, or other symptoms, it is worth looking into properly.

Dogs are very good at hiding problems during the day. Sometimes the quiet of the night is when those problems become easier to see.

FAQs

Why is my dog panting at night but not during the day?
This can happen with anxiety, pain when lying down, overheating in the sleeping area, or early medical issues that become more noticeable at rest.

Should I give my dog water when they pant at night?
Yes, your dog should always have access to fresh water. Excessive drinking, however, can also be a clue that something else is going on.

Can calming supplements or melatonin help?
Some dogs may benefit from calming support, but it is important to make sure the panting is not caused by pain or illness first.

If your dog has started panting more at night, the ASK A VET™ app can help you log patterns, track symptoms, and keep useful notes so you have a clearer picture of what is changing and when.