The Labrador retriever has been a mainstay on the American Kennel Club's most registered dog for years, so it's no surprise that there are so many lab mixes in the world. Some lab mixes are by design, such as when crossed with a poodle to make a labradoodle, while others are happy accidents. Your observation skills can help you guess what your lab is mixed with, or you can use a scientific test to learn for sure, or even learn more if you are interested in how to breed Labradors.