With a deep chest and shorter legs, bull terriers are not built for swimming and will have a harder time maintaining their buoyancy in water.
Little and fluffy, yet with a wide nose, these sociable puppies are still quite sensitive to temperature swings.
The basset hound was initially developed for hunting, but don't count on him to keep going if the trail takes him into some deep water.
The short muzzles and small legs of Shih Tzus only add to the difficulty of swimming.
A boxer's lengthy legs and muscular physique are no indication of his or her true skill. Similar to the pug, they are classified as brachycephalic due to their flat face and short snout.
While their larger muzzles will help them breathe better in the water than brachycephalic breeds like the pug, their short legs will prevent them from being able to paddle for very long.
Despite their athletic pedigree—they were originally developed in Wales, United Kingdom for herding—corgis aren't very adept swimmers.
The first one probably won't surprise you: it's the pug. Their flat features make it difficult for these little wrinkled puppies to breathe.