Additives used in the production of vaccines may include. 1  suspending fluid (e.g. sterile water, saline, or fluids containing protein); 2  preservatives and stabilizers to help the vaccine remain unchanged (e.g. albumin, phenols, and glycine); and. 3  adjuvants or enhancers to help the vaccine to be more effective.
The other element is a standard Yorkie that falls under or over the expected weight and/or size range. Breed standards have changed. The AKC used to list a minimum weight of 4 pounds (1.81 kg). Now, there is only a maximum weight of 7 pounds (3.17 kg) for a full grown, adult Yorkie. Even with this change on paper, most Yorkshire Terriers fit into the 3 to 7 lb. (1.36 kg to 3.17 kg) range. A dog smaller than this, fully grown, would be considered too small and may have size related health issues.
So how big do Teacup Yorkies get? Official breed standards for showing an adult Yorkshire Terrier insist that a Yorkie must weigh between four pounds (1.81 kilograms) and seven pounds (3.17 kilograms). The teacup is a phrase that is used to describe a Yorkie that at full adult size is less than four pounds in weight. An average teacup Yorkie weighs between one and three pounds as an adult dog.