Mixed breed, Mongrel, Hybrid, Designer dog, Mutts. They're all saying the exact same thing: Perfect
He wa'n't no common dog, he wa'n't no mongrel; he was a composite. A composite dog is a dog that is made up of all the valuable qualities that's in the dog breed—kind of a syndicate; and a mongrel is made up of all riffraff that's left over.
Mark Twain
I prefer mutts. The artificial construction of the gene pool is bad for the species as a whole. In a restricted gene pool, the defects pile up. The truly superior specimen is the outbred, not the inbred.
Michael Swift
Hybrid vigor is an important concept in the plant world. You get this from combining the different strengths of different strains. It's the same with mutts—if you want a dog with hybrid vigor—get a mutt.
Mary Gallagher