Australian Shepherds pant a lot because they’re a high-energy, double-coated breed that uses panting as their primary cooling system. In most cases, the panting you’re seeing is completely normal, especially after exercise, during warm weather, or when your dog is excited. But persistent panting that happens at rest, indoors, or without an obvious trigger can point to stress, pain, or an underlying health problem worth investigating.
How Panting Works for Double-Coated Breeds
Dogs don’t sweat through their skin the way humans do. Panting is how they regulate body temperature: rapid breathing moves air over the moist surfaces of the tongue and airways, evaporating moisture and releasing heat. For a breed like the Australian Shepherd, this system gets a workout.
Aussies have a dense, soft undercoat that traps air close to the skin and a coarser outer coat that shields against UV rays, moisture, and dirt. Together, these layers create a thermal barrier that slows heat transfer in both directions. That insulation helps in winter, and it actually slows heat absorption in summer too (one informal experiment showed ice melting more slowly when covered by a fur sample in 96°F heat, demonstrating the insulating effect). But while the coat buffers external heat, it also traps metabolic heat generated during activity. Your Aussie has to pant harder and longer to vent that internal warmth, which is why they often seem to pant more than short-coated breeds doing the same amount of exercise.
Normal Reasons Your Aussie Pants Heavily
A healthy dog at rest breathes about 18 to 34 times per minute. During and after physical activity, that rate climbs significantly, and panting replaces normal breathing. For a breed that was built to herd livestock all day, even a vigorous walk or backyard fetch session can rev up their metabolism enough to trigger noticeable panting.
The key question is how quickly the panting resolves. After exercise, your dog’s breathing should gradually slow as they cool down, especially once they’ve had water and moved to a shaded or air-conditioned space. If panting stays heavy and doesn’t taper off even after your dog has rested and had a water break, or if your dog seems disoriented or weak, that’s a sign something is wrong.
Beyond exercise, perfectly healthy Aussies pant when they’re excited, during car rides, when greeting people, or simply because the room is warmer than they’d prefer. Australian Shepherds are emotionally expressive dogs, and arousal of any kind, positive or negative, can trigger panting.
Stress and Anxiety Panting
Australian Shepherds are sensitive, intelligent dogs that bond closely with their owners. That same sensitivity makes them prone to anxiety, which is one of the most common non-physical reasons for excessive panting. Stress panting looks different from heat panting: it tends to happen when your dog hasn’t exercised, often paired with other behavioral changes like pacing, yawning, lip licking, whale eye (showing the whites of their eyes), or refusing to settle.
Common triggers include thunderstorms, fireworks, separation from their owner, unfamiliar environments, changes in household routine, or not getting enough mental stimulation. Aussies that are under-exercised or under-stimulated are especially prone to anxious behaviors, including panting. The fix often starts with more structured activity, puzzle toys, and training games that give their brain something to do. For dogs with deeper anxiety, a veterinary behaviorist can help with a targeted plan.
The most useful thing you can do is learn your individual dog’s baseline. Knowing what their normal breathing and body language look like makes it much easier to spot when panting is driven by stress rather than temperature.
Pain as a Hidden Cause
Dogs are notoriously good at hiding pain, and panting is one of the subtle ways it surfaces. If your Aussie is panting at rest, particularly at night or while lying down, and there’s no obvious heat or excitement trigger, pain is worth considering. Joint problems, abdominal discomfort, back injuries, and dental pain can all produce this kind of panting. You might also notice restlessness, reluctance to jump or climb stairs, changes in appetite, or a stiff gait. Australian Shepherds are active dogs that push through discomfort, so panting may be the only clue for a while.
Medical Conditions That Cause Panting
Cushing’s Disease
Cushing’s disease occurs when the body produces too much cortisol, the stress hormone. It’s one of the most commonly overlooked causes of excessive panting in middle-aged and older dogs. The elevated cortisol puts the body in a chronic state of physiological stress, which drives up panting even when your dog is cool and calm. Other hallmark signs include drinking noticeably more water, urinating more frequently, a bigger appetite, a pot-bellied appearance, and thinning hair. If your Aussie has developed several of these changes gradually over weeks or months, a simple blood test can check cortisol levels.
Heart Disease
Congestive heart failure reduces the heart’s ability to pump blood efficiently. When the heart can’t keep up, blood backs up into the lungs and fluid begins to accumulate there, a condition called pulmonary edema. That fluid buildup makes it harder for oxygen to pass into the bloodstream, so the dog compensates by breathing faster and panting more. You’ll often notice a soft, persistent cough alongside the panting, reduced stamina on walks, and sometimes labored breathing while lying down. Left-sided heart failure, the most common form in dogs, is the type that specifically causes fluid in the lungs.
Laryngeal Paralysis
This condition affects the muscles that open and close the airway at the back of the throat. When those muscles weaken or become paralyzed, the airway doesn’t open fully, making every breath harder. Dogs with laryngeal paralysis typically show noisy or raspy breathing, excessive panting, and a change in the sound of their bark (it may sound hoarse or quieter than it used to). It’s more common in older, large-breed dogs, and it tends to worsen in hot or humid weather when the dog needs to pant harder to cool down.
Heat and Humidity Risks
Even though the Aussie’s double coat provides some insulation against external heat, these dogs are still very much at risk for overheating, particularly in humid conditions. Panting works by evaporating moisture, and when the air is already saturated with humidity, that evaporation slows dramatically. Your dog pants harder but cools down less efficiently. Hot, humid days are the highest-risk combination.
Signs that panting has crossed from normal cooling into overheating include drooling more than usual, stumbling or seeming disoriented, and changes in gum or tongue color. A healthy dog’s gums and tongue are pink. If they turn deep red, blue, purple, or blackish, that’s an emergency. Those color changes indicate the body is either overheating severely or not getting enough oxygen, and your dog needs veterinary care immediately.
Practical steps that help: provide constant access to fresh water, avoid exercising during the hottest part of the day, offer shade and cool surfaces to lie on, and never leave your Aussie in a parked car. Even on a 75°F day, the interior of a car can reach dangerous temperatures within minutes.
When Panting Signals a Problem
Most panting in Australian Shepherds is normal. The patterns that should get your attention are panting that happens at rest without a clear reason, panting that’s much heavier or louder than your dog’s usual, panting that doesn’t resolve within a reasonable time after exercise, and panting accompanied by other changes like coughing, lethargy, appetite loss, or behavior shifts. Nighttime panting that wakes your dog (or you) is another red flag, since a cool, resting dog has no reason to pant unless something else is going on.
One useful habit is to count your dog’s resting breathing rate when they’re relaxed or sleeping. If it consistently falls within the 18 to 34 breaths per minute range and your dog seems comfortable, the panting you notice during active moments is almost certainly normal for the breed. If the resting rate is elevated or your dog seems to pant constantly regardless of temperature or activity, that’s worth bringing up with your vet.