I have had my All black MALE german shepherd for 5 years now, he obeys the simple commands: sit, stay, lay down, drop, down... but whenever you get him in the same vicinity as another dog..he wants to attack it or darn near does almost everytime...not to mention has chewed up 6 door knobs, destoryed almost every screen on my house, and still continues to jump and scratch and windows/walls of the exterior of my house.. i can be sitting right inside the door and he'll look at me and jump/scratch. this even occurs after he has been interacted with, or i simply walk outside the room and starts at it again..(when he was a puppy i kept him in the house for abt 6 months) - I have been told that i may of established in his mind that he deserves or needs to be in the house, which i totally understand. But, this behavior is not an every day occurance (as to the destruction of house).. I love my dog dearly and have tried so hard to not get rid of him, but the financial strains that he is causing me is beginning to get to much. Is this something that maybe a neuter would fix?? I've also read that some dogs are just like this in their DNA or nature...IF ANYONE HAS ANY IDEAS..PLEASE, PLEASE HELP!!