Weli have a big Argentino named Pako he is so sweet and I love him so much , but he is not trained at all ! And there is this guy that I know used to come over and beat or teas Pako all the time and my dog hated him so much... So yesterday Pako got loose and he attacked the guy ! Pako bit him from his arms 4 times and it was so scary! There was blood every where and I couldn't stop the dog he wouldn't listen to me when I said cut it out at that point he kept jumping on the poor dude... ( the guy is okey now)
But I want to know does Pako represents a danger on me or other people ? Cause I couldn't make him stop ! What should I do? And is it true that Argentinos and pits get all crazy when they become old and attack their owner?

All dogs will attack if absued and all dogs can be trained. Your dog is currently a danger to everyone but he can be helped with proper training. You will need help, don't try to train by yourself. Call around or ask a vet for a trainer. A second or third attach may mean the dog must be put down so act now.

No, bullies do not get meaner as they age. Its all a training thing.

Yes, you should be concerned that your dog attacked someone. It honestly shouldn't matter if you yourself beat your dog, dogs should NEVER bite. Dogs that bite are DANGEROUS.

Contact a trainer. Maybe even a lawyer...

Aggression DOES get worse and will continue to escalate until they are about 4. is he neutered? I hate having to say this, but once a dog attacks, he becomes a liability. You NEED to get him into behavior mod and some sort of obedience training. If you can not control your dog, then he should NOT be in your hands.

You are very lucky this fellow is not pressing charges, you could loose EVERYTHING you have. I am a firm believer that once a dog attacks, he needs to be dealt with accordingly. Imagine if that was a kid?