My past posts have demonstrated the importance of genetic variation; the more mixed the parents are, the more the puppies will be. If a dog has parents that are mixed and have genetic tendencies selected out, the puppies will have even less of a genetic tendency for diseases. The type of dog that would then be healthiest, is a mutt. Mutt is considered to be an insult, but a mutt will be the best dog you could get. Mutts do still have some known health issues such as hip dysplasia, allergies, ear infections, and cancer. https://en.wikipedia.org/wiki/Hip_dysplasia_(canine)
My first dog, Olive, was a mutt, as a result of two neighborhood mutts. The only breed we know Olive had in here for sure was black lab. The mystery dog that resulted from two mutts was a healthy, smart, friendly, and obedient mutt. She needed very minimal training. Olive would not run off, bite, or go to the bathroom in the house without any prompting. Her temperament, health, and energy were great her entire life. Olive was killed in an accident, so she may have eventually developed a disorder, but from what we know she had no genetic disorders. I believe that a mutt is the best dog that you could own, but I am very biased.
