A survival game a survival game

Now you walk to the second floor. You feel there is something sticky on the stairs and you see...blood. Both fresh blood and blood that's left for a long time.
Suddenly, there comes a creature that looks almost like a dog, crushing directly into you. You think that you invaded its house and it's attacking you.

You decided to...

>Defend yourself using the knife you just got from the kitchen

>Wait and see what the dog is going to do exactly