The pericardium is a tough, layered sac that wraps around the heart. When the heart beats, it slides easily within the sac. Normally, only 2 to 3 tablespoons of clear-yellow pericardial fluid are present between two layers, which lubricates the heart's movements within the sac.
Biewer. The Biewer (pronounced Bee-vair), also known as the Biewer Terrier, Biewer a la Pom Pon, Biewer Yorkshire Terrier, Biewer Yorkshire, or Biewer Yorkie is a variant of the Yorkshire Terrier.
Common Name(s) Chorkie, Chia-Yorkie, Yorkie-Chi, Yorkiehuahua. Breed Type The Chorkie is a mixed breed, the product of a cross between a Yorkshire Terrier and a Chihuahua. This breed is sensitive to cold temperatures, so it is best suited to a warm climate. Background Chorkies have only recently become a popular hybrid.