Ok, so you ZERO experience with this situation, just as I thought.
Now, let me tell you how things work in this situation since I have been in it. Yelling at a dog that has intentions to rip you apart does no good at all.
Guy that lives across the street had a black lab that went after multiple people on our street. The dog jumped a fence and bit a kid.
Later the dog got out again, ran across the street from the guys house, cornered me before I could get in my house right after I got off work. I screamed at the dog, clapped, and it kept getting closer and coming after me. The only thing that saved me was being able to get back into my car.
I called animal control, they "knew" of the dog, gave the guy a ticket. Later when Cordell and Paul were at my house the dog again ran from across the street and up towards my garage where we inside. Paul chased the damn thing off with a shovel.
Finally the dog came across the street, again, and attacked a lady in my yard and tore her up good. Guess what? She was yelling at the dog and it gave no fucks. We almost had to go to court to testify for her.
Animal control finally too the POS dog and put it down.
Cliffs: You go ahead and be a man and take your chances yelling at a dog that is in attack mode, I've learned my lesson and won't.