"Sundae the Morkshire Terrier as a young puppy. Her mom is a Maltese and her father is a Biewer Yorkshire Terrier."—Courtesy of American Morkshire Terrier Club, Inc.
The Morkshire Terrier is not a purebred dog. It is a cross between the Biewer Terrier and the Maltese. The best way to determine the temperament of a mixed breed is to look up all breeds in the cross and know you can get any combination of any of the characteristics found in either breed. Not all of these designer hybrid dogs being bred are 50% purebred to 50% purebred. It is very common for breeders to breed multi-generation crosses.