Poor boxers. Nowadays, they're pretty much a mess. Not only do they have difficulty controlling their body temperature when it's super hot outside, but they have one of the highest cancer rates in canines.
Ahhh, little hot dogs! Dachshunds used to have limbs that actually matched their size. Because their growth was stunted but their necks and backs got longer, they struggle with the highest risk for "intervertebral disc disease," which can cause paralysis.
Oh, pugs! They're the cutest of the cute. Seriously, it's impossible to not have your heart melted by these squishy little faces. However, the pug is an extremely high-risk breed. They've got heart problems, high blood pressure, difficulty breathing, overheating issues and dermatitis.
What a life. Guess I'll just have to snuggle them forever or something.
It's hard not to fall in love with the English bulldog, but according to the Science and Dogs blog, "The English bulldog has come to symbolize all that is wrong with the dog fancy and not without good reason; they suffer from almost every possible disease."
While it's common for generations to develop certain issues, it's unnatural when breeders pick specific traits to pass down, many of which directly result in disease.
The changes from 1915 or 2016 are pretty crazy. I can't imagine what another 100 years will bring.