The Top Dog Breeds That Have Changed in Appearance Over 100 Years

Dog breeds have changed in the last hundred years. In the early 1900s, dogs were bred to be hunters and herders, sometimes both simultaneously, which means they could perform their duties more quickly than modern-day dogs. This adaptation process took place over hundreds of years, so not every breed has changed much, but it’s fascinating to see how some breeds have evolved over time! We wanted to put together this list of dog breeds that have changed in appearance over the last hundred years and see how our canine companions have evolved!

Pug

When one thinks of a pug, the first thing that comes to mind is those wide-set eyes and the smushed-in nose. As such, it may be surprising to know that these traits weren't always found in a pug.

According to evolution, these attributes eventually became part of the breed due to cross-breeding with other dogs, which is thought by some to have occurred in China as early as 1000 A.D., if not earlier. The old pugs have a distinct, though small, snout. These days, pugs look different from their predecessors and suffer from breathing and other health issues.

Bull Terriers

Bull Terriers have always been stout and muscular, but the look of the breed has shifted over time. Initially, they had shorter, wider skulls while the jaws and the bridge of their nose became larger. This resulted in more pronounced folds in the skin and droopier jowls. The modern version has a longer, narrower head with fewer wrinkles on the face. It's also a bit slimmer around the waistline than before.

Today, this dog is bred to be an athletic dog that doesn't just sit home all day long. They can be competitive with other breeds in obedience competitions or agility races, or even as show dogs. They're considered to be some of the smartest and most active breeds today.

Irish Setter

Irish Setters have become stockier over the last century, likely due to breeders selecting the physical traits preferred today. Changes in type may also be due to this breed being created as a hybrid of multiple other breeds, including the English Pointer, Gordon Setter, and Tweed Water Spaniel.

Another possible explanation is that Irish Setters were originally bred to hunt smaller prey like hares, rabbits, and foxes, which require more endurance than strength. Today they're often used on larger prey like deer or wild boar, which requires more power than endurance. They also have a thicker coat, protecting them from harsh weather.

West Highland White Terrier

West Highland White Terriers have changed over the past hundred years. Their fur has become longer, and their coat has become thicker. They were initially bred for hunting foxes and rats.

The modern versions are very playful and can be stubborn when they're trained to be obedient, usually through a clicker method. Westie's typically weigh 11-16 pounds and stand 10-12 inches tall. Most of them have white hair, but occasionally some are born with blue or purple-colored eyes. The modern Westie's lifespan is 12-14 years on average.