I have a 3 year old GSD. She became part of our family at 8 weeks and I immediately started training. At this time we also had a Jack Russell terrier with some very bad habits. Although the two were very different they were best of friends. My GSD, named Freya, has basic obedience. She can sit, stay, down and heel. She is fed twice a day when we have breakfast and dinner. She sleeps locked in our room with us as she had started to soil in the basement when our Jack Russell passed away. (Our Jack Russell, Buzz, passed away about one year ago). She is only walked about one mile a day. The rest of the day she runs outside on our one acre lot which is fenced in with an invisible fence, is indoors, or going on car rides. She does NOT come when she is called if outside. Since the passing of Buzz her fence aggression has increased to her hair bristling on her back. She only charges the fence when other dog walkers are going by. This behavior is just toward's other dog's walking past our house. If she is walking on a lease herself she does not even pay any mind to other dogs. She will even bolt out of my front door if she sees a dog walking by. She charges the fence barking, hair bristling, and then will run the perimeter of the yard going nuts until the dog and walker have passed the house. When this is happening she is crazed, like she can't hear at all. She won't respond to any of her commands, not even touch her favorite. The behavior is not only embarrassing but dangerous. The invisible fence failed once and she bit a passing dog in the hind quarters leaving puncture wounds. I know I need help and have reached out to several trainers in our area but they are extremely expensive. I am alright paying that but I would like some insight to be sure it seems like what they propose is reasonable. (I have 2 separate trainers coming to the house this week to assess the situation) My neighbor's hated the dog ever since she was a puppy and now they have added ammunition. I would love any insight!! I know I need to stop this behavior. I also don't want it to seem as if she is left out all the time either, she is not. She will do this even after a car ride. I may open the car door and she will see a dog that I didn't and charge! Thank you for any help.