Neither mixed breeds nor purebreds are “better.” Purebreds have the advantage of growing into a size, type, and general personality that is predictable, but mixed breeds make just as wonderful pets and steal your heart every bit as quickly. (And for the record, my opinion is that mixes are no more healthy or not than purebreds. “Hybrid vigor” is a bit of a fallacy especially with the currently popular “doodles” and “poos.”) What it comes down to is that the dog who wiggles his way into your heart and soul is the “best” – it doesn’t matter at all what his lineage is.