I have a four year old German shepherd ... he has sired 5 puppies - 2 females and 3 males. I have raised him since he was two weeks old.

His name is C.G. . He was initially trained for discipline by Mr. Mike Stone . After only fifteen minutes, Mike Stone was already successful in teaching him 4 basic commands ... he was like seven months old then.

I took over his training using some articles from the internet. He has learned toilet training, barking only when necessary, all the basic commands like heel, stay, roll, jump, fetch , stand, sit and many more.

He really has a mild temperament ... the only time he was aggressive was when he was with his female baby pup for three months.

He is socialable to other dogs. He only defends himself by that i mean he does not initate any dog fight. He knows he just have to ignore other snarling dogs but just keep is distance.

Since he is a guard dog at night, he prowls the grounds of the house, do you think it will be wise to teach him the attack command. so that in case of a prowler he can subdue that person. He know the bite command but he applies that to objects that you point to him to bite.

He loves to run a lot, catch flying disk, tennis ball or stick and swim for thrown items on a beach.

He does not mind being pinched by babies, or kids ... in fact he has a high pain threshold level. He weighs in at 110-115 pounds . Just average weight since he runs a lot.

would you say that there is a disadvantage in teaching a dog the attack command ?