Here's why:
* Possible Side Effects: While rare, some dogs can experience mild reactions to vaccines, including tremors. It's possible your Yorkie is having a reaction to the vaccine.
* Other Potential Issues: Shaking could also be a sign of something more serious, like an allergic reaction, underlying health condition, or even a reaction to another medication.
Don't wait to see if it goes away. Your veterinarian can assess the situation and provide the best course of action.