A hybrid dog is one that is cross-bred from two recognized pure breeds. The pedigree or parentage of hybrids is known. The term is used loosely as a synonym for mixed breeds, tykes, mutts, and mongrels. They are all essentially the same except that in the case of hybrids and designer dogs, the parents’ breed is known while the others are of uncertain ancestry. It is worth noting that many of the pure breeds as we know...