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.
1 Every Yorkshire Terrier puppy will have its own unique personality, and it may be best to go in with an open mind and choose a puppy based on its personality rather than its sex. 2  An average Yorkshire Terrier is approximately 7 inches (17.78 cm) to 8 inches (20.32 cm) tall and weighs between 3 lbs. ( 3 1.36 kg) to 7 lbs.