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These Are The Top Dog And Cat Breeds (And Names!) This Year

6. Most Popular Dogs: No. 6 Mixed Breed
At number six on the list are the mixed breeds, or mutts, as we used to call them. Nowadays, you could just call them designer dogs and make up the breed name yourself. Of course, if you don't know your dogs lineage, you could do a test to find out. Remember, we advocate adoption over shopping for a purebred dog.