Panting is when dogs breathe rapidly with their mouth open and tongue hanging out like a slobbery yo-yo. You know what we’re talking about. So other than as an effective method of drool distribution, why do they do it?
Some dogs may occasionally pant when they’re excited or afraid, but the main reason is to help keep themselves from overheating.
In a recent IAMS™ survey,* a majority of dog parents believed that dogs have sweat glands. But dogs don’t sweat like humans do. “We have glands all over our body. Dogs can’t do that,” says Opens a new windowDr. Jo Gale, BVetMed CertLAS MRCVS, Senior Manager, Global Science Advocacy at Waltham Petcare Science Institute. “They have sweat glands on their paw pads, but that’s the only place.” They rely on panting to let out warm air and bring in cooler air. All that drool and fluid in their mouth helps dissipate the heat as well. It’s like a big soggy air conditioner.
Most mammals, and even many birds, pant to regulate their temperatures. Humans are some of the only creatures who cool down by perspiration. Imagine what dogs think of us losing fluid from all over our bodies, sweating through our clothes and needing to wipe our faces all the time. Fortunately, they love us anyway.
Panting is normal, but it expends lots of water, so make sure Fido’s bowl is full of clean, cool H2O, especially during warmer months.
Opens a new windowDr. Tammie King, Applied Behavior Technical Leader at Waltham Petcare Science Institute, suggests “seeking out cool shade, giving them water and stopping physical activity.”
And it goes without saying — but we’re going to say it anyway — that you should never leave your dog in your vehicle on hot days. Even if they’re driving. Which you shouldn’t let them do either.
Some dogs run a higher risk of overheating. “It’s very easy for dogs to overheat on very hot days,” cautions Dr. Jo Gale. “Any dog with a squashed face — bulldogs, pugs, Pekingese — their nasal passages are not able to cool the air as much.” She added that dogs with heavy coats, overweight dogs, and very old or very young pets also can’t control their body temperature as effectively.
If your pooch seems to be panting more than usual or at unusual times, check to see if they’re having trouble breathing, are shaking, or their gums or tongue have noticeably changed color. If so, make sure they have access to water, get them to a cool place and contact your vet.
*Surveyed U.S. dog owners, age 18+
Sample Size: n=201
Fielded May 8-10, 2020



Wheat is a grain used as a high-quality carbohydrate source in dry dog foods and biscuits. It provides energy for daily activity, as well as processing characteristics for the food. IAMS™ research has shown that including wheat in a complete and balanced diet results in a moderate glycemic response in dogs, which is lower, in general, than the response observed when a rice-based diet was fed. 1,2
A common misconception is that feeding wheat causes food allergies. The facts are:
Gluten (a protein found in wheat) is responsible for wheat-sensitive enteropathy, occasionally found in Irish Setters from the United Kingdom. Gluten enteropathy of Irish Setters is a malabsorption syndrome, which responds to the removal of wheat (gluten) from the diet. This condition is very rare, and the reason some dogs develop it is not yet clear.
1 Sunvold GD. “The role of novel nutrients in managing obesity.” In: Recent Advances in Canine and Feline Nutrition, Vol II: 1998 IAMS Nutrition Symposium Proceedings. Carey DP, Norton SA, Bolser SM, eds. Wilmington, OH: Orange Frazer Press, 1998; 123–133.
2 Bouchard GF. “Effect of dietary carbohydrate source on posprandial plasma glucose and insulin concentration in cats.” In: Recent Advances in Canine and Feline Nutrition, Vol III: 2000 IAMS Nutrition Symposium Proceedings. Reinhart GA, Carey DP eds. Wilmington, OH: Orange Frazer Press, 2000; 91–101.
3 Jeffers JG. “Responses of dogs with food allergies to a single-ingredient dietary provocation.” J Am Vet Med Assoc. 1996, vol 209(3): 608–611.