Pugs are a classic example of a dog that is not designed for strenuous exercise, according to Fink. “Pugs are a brachycephalic breed, which means they are born with a very short nose with tiny nasal openings, an elongated soft palate, and small airways leading to their lungs,” Fink says. “This makes them unable to tolerate exercise, and that, combined with overfeeding, could lead to obesity.”
Fink also points out that pugs do not tolerate heat well, so they cannot be exercised outdoors as much as a dog with normal airways. “They were bred to be lapdogs,” she adds. Because of their builds and personalities, pugs generally don’t get enough exercise, but they get plenty of affection and treats, which can cause weight gain.