Further crossbreeding occurred, with Welsh corgis, Chihuahuas, and other smaller breeds of terrier. Teacup Chihuahuas can have either short or long hair. Unlike many longhaired breeds, longhaired Chihuahuas require no trimming and minimal grooming. It is also very risky for Teacup Chihuahuas to have puppies due to their size. The AKC considers Long and Smooth coated chihuahuas to be the same breed. Finalists were Aardvarks, Buckaroos, Chihuahuas, Desert Gators, and Sun Dogs. Chihuahuas are the smallest breed recognised by some kennel clubs. Though Rourke's dogs are generally referred to as "chihuahuas", some are not purebred. Chihuahuas, and other toy breeds, can be affected by hydrocephalus. The Reys owned three Chihuahuas and a German Shepherd. All Chihuahuas are light and all St Bernards are heavy. She entered the house with her two pet chihuahuas. She has been known to frequently introduce her two pet chihuahuas to interviewers. Oversized Chihuahuas are seen in some of the best, and worst, bloodlines. Apple Head Chihuahuas are longer than they are tall and have shorter necks.