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Why Is My Dog Panting at Night? 9 Common Reasons (Vet Answer)

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Dr. Paola Cuevas Photo

Written by

Dr. Paola Cuevas

Vet, MVZ

The information is current and up-to-date in accordance with the latest veterinarian research.

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While we humans quickly begin to drip sweat through our pores under the hot summer sun, dogs have no sweat glands; they release body heat through their paw pads and through panting. When a dog pants, it releases hot air out of the body and inhales cool air to regulate its body temperature through evaporation. You might have noticed dogs tend to pant after a walk on a hot day or after intense activity such as running, which is perfectly normal. When your dog is panting to regulate its body temperature, it will lose a large amount of water evaporation, so we have to make sure it has access to fresh, clean drinking water to help it replenish its hydration status.

But what if you’re heading your dog pant in the middle of the night, what could be the cause for that? Let’s take a closer look.

divider-pawMost Likely Cause of Panting: Heatstroke

Excited dogs tend to pant, wag their tail, and make whining sounds when they are happy to greet a person, receive a treat, or get a chance to play with their favorite toy.

Panting in these scenarios is a normal behavior in all dogs and there is no reason for concern.

However, panting can also indicate a serious condition in the scenario of heatstroke. This is less likely to happen at night, but we’ll lay out key indicators of this potential issue before taking a closer look at nighttime variables.

Heatstroke

Heatstroke is a veterinary emergency. In extreme weather conditions, a dog can easily get overheated and quickly get dehydrated and even die.

Heatstroke tends to happen in:
  • Dogs that are exercised without taking breaks or without drinking water.
  • Dogs that are left outside during hot sunny days without access to shade.
  • Dogs inside cars during hot days can easily get overheated.

Heavy panting, restlessness, laying flat, or even collapse are signs of heatstroke. Offer cool (not cold) drinking water and attempt to gradually reduce the body temperature of your dog by placing it in a controlled temperature room such as a room or car with an air conditioner or by covering its body with cool towels while you make your way to the veterinary clinic. Once at the clinic, the dog most likely will need some IV fluids to help recover his normal body temperature and hydration status. A blood sample will be needed to investigate the state of the internal organs.

However, if a dog is panting at night, especially if the environmental temperature is normal, that tends to be an indication that something else is going on requiring additional investigation. If the panting does not correlate to activity or environmental temperature, there’s likely something else afoot.

The 9 Common Reasons Why a Dog Might Be Panting at Night

1. Stress

dog scared hiding under bed blanket
Image Credit: Aleksey Boyko, Shutterstock

Besides a way of showing excitement, panting is also a way dogs express stress. Studying the scenario, including the rest of the dog’s body language, and any new stimuli that might be stressing the dog will help you find a solution to calm them. Dogs that are panting due to stress tend to have wide-open eyes and look restless. Besides recognizing and removing the stressor factor, pheromone diffusers could be of help for your stressed dog to calm down before the issue escalated to anxiety and fear.


2. Anxiety and Fear

Similar to a stressed dog, an anxious or scared dog will pant, tuck its tail between its legs, and have its eyes wide open. Some will run to hide, others will be shaky. This is commonly seen in dogs during thunderstorms and fireworks. This is a very traumatic event for a dog, talking with a veterinarian about the possibility of anti-anxiety treatments such as calming treats, specialized diets, or even prescription medication might be the way to go, depending on the severity of the anxiety.


3. Pain

dog in pain aggressive
Image Credit: Bonsales, Shutterstock

Dogs that are in pain have an elevated heart rate and elevated respiratory rate and could be panting. If you see your dog is limping, that is a clear indication that panting is related to pain. However, even if you cannot see any clear injury, your pup might still be in pain due to something that’s not visible, like an internal organ issue, which needs to be checked by the vet.


4. Anemia

Anemia is a condition where there are not enough red blood cells to deliver oxygen to all the organs of the dog’s body. Organs with a lack of oxygen do not function normally. There are several different kinds and causes of anemia including parasites, blood loss, toxicity, and disease. Besides excessive panting, anemic dogs tend to look tired and have pale gums. To successfully treat the anemia, the veterinarian needs to investigate what is causing the condition.


5. Cushing’s Disease

sick husky dog in vet
Image Credit: Pressmaster, Shutterstock

Cushing’s disease is an endocrine disorder where the adrenal glands secrete an excess of cortisol. Several reasons can cause this disorder including tumors of the pituitary or adrenal glands and the long-term use of corticosteroid drugs. Panting is one of the hallmark signs of Cushing’s disease in dogs. Other characteristic signs are a pot-like belly, increased thirst, urination, and hunger. Cushing’s disease is more common in older dogs and needs specialized testing to be accurately diagnosed. The management treatment of Cushing’s depends on the causing factor. Some cases can be treated with oral medication but others require complex surgery. A veterinarian diagnosing the disease should be able to recommend a treatment plan.


6. Heart Disease

When the blood-pumping organ is not working properly, the oxygenation is compromised. Panting is one of the signs of heart disease. Heart disease can be caused by parasites such as heartworm, which dogs can get through the sting of a larva-infected mosquito. Dogs that live in areas of a high prevalence of the parasite Dirofilaria immitis, or heartworm, should get a prophylactic monthly treatment. Products such as Heartgard avoid the infestation by this roundworm. Other non-infectious forms of heart disease include arrhythmias, cardiomyopathies, and valve disorders.


7. Cognitive Dysfunction

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Image Credit: didesign021, Shutterstock

Older dogs suffer from a dementia-like syndrome known as cognitive dysfunction. Panting and pacing at night are some of the many signs of this condition. Cognitive dysfunction is a degenerative disease affecting the brain and memory it results in changes in the dog’s behavior and motor function. There is no cure for this condition, however, management treatment options include supplements, medications, and behavioral modification methods.


8. Medications

Medications such as prednisone and steroids are well known to cause panting in dogs. If your dog is under medication and is panting excessively you must address the issue with the veterinarian.


9. Facial Structure

Brachycephalic dog breeds such as the Pugs, Boxers, and Bulldogs tend to make abnormal snoring-like sounds when they pant due to the airway obstruction caused by their anatomy. This same obstruction makes them more susceptible to heatstroke.

Likewise, Labradors and Golden Retrievers could suffer a condition called laryngeal paralysis where the vocal cords do not open wide enough to allow air to flow normally resulting in an abrasive sound. The airway obstruction again makes these breeds more susceptible to heatstroke.

divider-pawConclusion

Panting can be normal behavior in dogs when they are excited, have a normal moderate physical activity, or are trying to release some body heat. Excessive panting with abnormal behavior on a hot day should be treated as a medical emergency due to the possibility and risks of heatstroke. A dog panting at night is indicative of other issues and should be investigated.

If your dog is panting and presenting other symptoms such as compromised breathing, coughing, lack of appetite, low energy, or any change of behavior that concerns you, please go to the vet immediately.

As usual, you know your dog better than anyone, and if you have noticed a change in its behavior and you are concerned something is going on, it is always better to err on the side of caution and treat medical issues sooner rather than later.


Featured Image Credit: Daniel Myjones, Shutterstock

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