territorial aggression

[Mwguy101]

My one year old male, netured, german shephard is showing signs of territorial aggression, such as,


Barking and growling at the repair man, he maid in the hotel, and kids.
He barks, growls, and jumps around any time kids get around him.
Attacking other dogs that come near his tennis ball
Barking at random people


This behavior is getting to a serious level. I am not sure how to handle this. I brought him on a business trip with me and while we were playing fetch on the tennis court of the hotel he ran off and attacked another dog that was peeing. After that he almost bit someone when we were walking around. I am not sure what to do any more. Please help.

[PaddyD]

That's not territorial aggression. Since when is a hotel's tennis court his territory?
Looks more like fear aggression. He is reacting from fear.
Hopefully, a canine behaviorist would give you a better answer and solution to your problem.