Introducing two mice to another mouse

Question
Hi, I have two female mice and decided to get
A third. I'm worried that my two girls will pick on the new one and hurt her? How
Do I prevent this?

Answer
Dear Xaiviea,

Get some REAL vanilla extract - the fake stuff won't work- and dab it onto their necks and rumps. Then put them in a totally new cage with everything very clean. Watch them carefully. A bunch of chasing and squeaking is fine. What are not fine are any of the following:

1.  Blood
2.  Mouse is lethargic, depressed
3.  Mouse is blocked from wheel, food, water, or nest
4. Chasing is literally nonstop.

If you have any trouble, do write back. There are ways to change the balance of power.

Squeaks n giggles,

Natasha