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.
There are only two types of yorkies the regular(black and white) and the biewer yorkie(black brown and white). Teacup puppies are not healthy and are just the weaklings of the yorkie breed. btw you will need to brush that long coat a lot to make it pretty and shiny. Good luck=) these dogs are great=D.