All dog breeds originally come from one common ancestor but have drastically changed over the years. Genetic variance and selective breeding by humans has drastically diversified what dogs look like and how they function. There are around 200 to 300 dog breeds depending on which kennel club you subscribe to. Some of the differences in appearance are small, but it comes down to what you’re looking for. Dogs aren’t meant to be kept as pets originally and even though some have been bred and trained to stay indoors, they don’t all benefit. These are the top dog breeds that vets agree weren’t meant for your home.