You just as soon bring the phone to throw at it instead!
People watch too many movies wherein they think it's so easy to hit your target with a pistol.
It's not! With such a short barrel you would never hit the cat through anything other than sheer luck.
I've set up a bottle and given a loaded pistol to many a person and challenged them to hit it from 20 feet away and they miss every time.
Just the act of pulling the trigger can move you off target and send the bullet off several feet.
If you ever went to a shooting range you'd know how useless a "pistol" would be in that situation.
What you need is a shotgun with a good spread pattern and some 00 buckshot!
Stop it. I can shoot a moving fly between the eyes at 200 feet.