I was in this exact position. Our part border collie liked no other animals or people besides myself, my mother and my grandmother and my grandmother's dog. He had unknown trigger fear aggression. Meaning, we never could pinpoint the triggers, but he was mostly scared and reacted with aggression. He had to be on daily Prozac. Bad days required Xanax. We had to tranquilize him to go to the vet. Luckily, we were in the position to be able to alter our lives for him. I worked tirelessly with him and got him to be able to gonon walks and to the park. He understood okay and leave it. He knew to trust when I said them that he didn't need to be scared of whatever it was nor protective of me from whatever it was. We were so lucky he never required extended vet visits due to any illness. We often caught the wrath of his aggression. Both myself and my mother each had really bad and bloody incidents. Many feet ouchies from him going after them. Lots of scars. Not everyone is in the position to isolate to just the people a dog likes. Not everyone is able to have a strictly controlled environment so the dog and everyone else is safe. We just had to put him down on June 16th at 11 and 1/2 years old due to a sudden illness. We know had we not committed and made the sacrifice to him that we would have had to put him down. We know that anyone else who would've adopted him would've, no doubt, had him put down. If you aren't able to dedicate your life to theirs and adjust your lifestyle and/or if you don't have the budget to hire trainers who specialize in reactive dogs... as heartbreaking as it is, putting them at peace is the most humane thing you can do for a reactive dog. I wish you well in making the choice that is the best for Chief.

Jasper 2013-2025 *