What do you do with an aggressive german shepard with a history of bad beharior?

Question

He's a 7 year old male.

Answer 1

Think you are about 7 years late, but take him to a good dog trainer if you can't train him yourself.

It might cost a bit, but to have a well trained dog is of benefit to you.

You owe it to the dog and everybody that he meets.

Answer 2

I'd re-post to under Pets, then Dogs not History to get the most answers.  Also, add more information - have you always owned this dog?  Intact or neutered?  Recent examples of aggression - IE my girlfriend came to my house and the dog nipped her as she walked by - no provocation.  OR a bunch of friends were rough-housing and he got excited and then barked & lunged wildly.  

So - even at 7 - a dog can be trained.  (You CAN teach an old dog new tricks - unlike the old wives' tale)  I would take him to obedience class.  If intact - neuter him even at this age.  Depending on the level of aggression - get a private assessment/lessons from an obedience instructor.  If something in particular really riles him up - try to remove or limit that in his environment.  

Would love to know more so we can give you a better answer.  Re-post under Pets, Dogs and the community will respond!!

Answer 3

castration.

Answer 4

For tens of thousands of years, humans have domesticated the animal.  Dogs like that need to be put down.  He's had a 7 year life.  Let him go.

Or you could confine him to an unpleasant cage.

Or you could read Cesar Milan's book and he'll have some ideas.