If you cross a Chihuahua with a Yorkshire terrier, the result is a small, mixed breed called the Chorkie. The only thing you can be certain about your hybrid puppy is that he'll stay a small dog. A Chorkie can look like a mix of both parents, or strongly take after one or the other. That's also true of temperament.
The smallest of all dog breeds, Chis weigh no more than 6 pounds when full-grown. They stand under 5 inches tall at the shoulder. Often a one-person dog, the Chi is absolutely devoted to that individual. Chis are quite bright, but tend to nip or worse if they feel threatened.
The Yorkshire Terrier
The Yorkshire terrier originated in northern England, developed as a vermin hunter. It wasn't long before they became the canine favorites of fashionable women. At maturity, the Yorkie can't weigh more than 7 pounds to compete in American Kennel Club conformation classes. Most Yorkies mature between 8 and 9 inches tall at the shoulder. For his size, he makes an excellent watchdog, although excessive barking is another Yorkie trait.
Chorkie General Appearance
Chihuahuas appear in short and longhair versions, while Yorkie hair is straight and silky. Your Chorkie's coat might resemble any of these possibilities, or perhaps a combination. If he takes after the Yorkie, he'll require a lot more grooming than a Chorkie resembling a Chi. Shorthair Chorkies might need coats or sweaters for cold weather outings. Any color is permitted in the Chi breed standard, along with white markings. Yorkies are blue and tan, with no white.
The Yorkie is a terrier, and the Chi has terrierlike qualities. Expect your Chorkie to be a bold little dog, possibly too fearless for his own good. Both breeds get along with cats, but might challenge bigger dogs. Like his parents, the Chorkie is too small to serve as a good pet for young kids, but he can act as a companion to older children who know better than to roughhouse with him. Both the Chi and the Yorkie are often difficult to housebreak. It can be done with time and patience, but you might not want to let your Chorkie have unsupervised run of the house.
Chorkie health issues include those common to both parental breeds and other exceptionally small dogs. Both breeds suffer from luxated patellas, or slipped kneecaps. Dental problems are the bane of most small breeds, as the 42 adult canine teeth must fit into tiny mouths. Both breeds are especially prone to collapsed tracheas, especially as they age. Hydrocephalus, or water on the brain, occurs in Chis, while Legg-Calvé-Perthes disease, a leg disorder, is found in Yorkies.