Help! There's a rodent!

Twinkle - The night she came home.
Barely 5 mos. old female shih tzu

Ugh, can you believe that??? Momma and Dada brought another rodent in our house! and she is a girl and a Shih Tzu breed like me!!! (sob! mad! bark! lots of bark!!) I can't believe this. Parents said they will be out to watch a movie and that Me and Sunny should take a nap, and that's what we did, but boy! My mean parents did not watch a movie, they went to Petland and got Twinkle! Yah, that is her name according to them. Me and Sunny don't like her at all. She feels so confident running around the house and trying to play with us. BUt...no no, she'd be getting a cold shoulder, growl and we are gonna make sure to scare her and make her leave us aloooonnneee! Get this rodent out of this house!