Moo the AdSense dog! Moo is a Chihuahua mixed with something else, possibly with a Jack Russell Terrier (Jack Chi)
Mixed-breed dogs vary tremendously in looks, size and temperament, even varying within the same litter. What is a mixed breed? A mixed-breed dog is a dog that is not a purebred; also called a mongrel, cur or mutt. Mongrels and mutts are technically dogs of unknown ancestry and questionable parentage.
Scientifically speaking, the term "hybrid is incorrect as all dogs are a sub-species of wolf (canis lupus familiaris) and as such, it is impossible to have a hybrid as they are two of the same species. Although technically incorrect, the term "hybrid" is the name which is overwhelmingly used for these mixes and therefore it is the name we will also use when referring to them.
A purebred is a dog that has parents of the same breed; of or belonging to a recognized strain established by breeding individuals of unmixed lineage over many generations. For example, a purebred Yorkshire Terrier bred to another purebred Yorkshire Terrier will have a litter of purebred Yorkshire Terrier puppies.
Mila, a mix breed dog as a puppy at 4 months old from Belize, a country in Central America with a coast overlooking the Caribbean Sea.