Leila is sad just thinking about someone pulling her behind them!
Poor puppy. I just can't stand people who are mean to animals. Animals can't say "Stop!" or "Mommy, you're running too fast for me!" Chihuahuas have very tiny, short legs, and need to run 10 times your speed to keep up. Please do me a favor and read this, or this, before trying to run with any dog. Want to adopt a dog? Here's a list of dogs that are good runners. Notice very few small breeds make the list.
Think about choices, and how dogs have none. Be sweet to those little sweetie pies! Now, if you'll excuse me, I have to take off my Puppy Police uniform and crawl into bed.