Our list includes small breeds weighing approximately six to 14 pounds. While we can’t deny teacup breeds are super cute, these pups usually weigh only 4 pounds and are not recognized by the American Kennel Club (AKC). The AKC states, “This is not an actual size classification and is usually attained through breeding runts. So-called teacup dogs often come with a host of health problems.” These include hypoglycemia, respiratory issues, heart defects, and digestive problems, just to name a few. Plus, they’re so fragile and tiny that you have to be on high alert as a pet parent to prevent injury.