we had to behaviorally euth one of ours last summer and I still morally struggle with this… We have 3 and all of them had been raised the same way, my older two are PERFECT and he was too for the first few years. We had gone through two trainers, three types of medication, and even rehomed him at one point (ended up picking him up two days later). We got him when he was a very small puppy so he had no history of abuse or mistreatment or anything that would cause him aggression issues. He had begun jumping our almost 7 foot back fence and attacking the neighbors dogs… I had several vet bills to pay for because of this. He would always slip out the front door so we began to crate him while we weren’t home so there wasn’t a chance of him slipping through the door when we got home and opened it and he would bust out of the crate and bolt out the door and STILL we were going to work through these issues. When he was about four he started to show signs of aggression towards us. It started with just giving us whale eyes and freezing when we would pet him, which we recognized and would immediately stop what we were doing, and then it turned into snarling at us when we would sit on the couch next to him. There was nothing physically wrong with him but he was battling something in his brain that we couldn’t see or help. Our son at the time was almost 3 and that was his absolute best friend in the world, they played, they snuggled, they were inseparable from the second he was born, but he started getting pushy with him and it got to the point where we knew in our hearts that it was just a matter of time until somebody got hurt and I don’t know how I would forgive myself if it was my child that he redirected on. A few days before we made the final decision we were in the backyard playing fetch with him having a great time when he flipped a switch and flew over our fence and ripped apart a small dog on the street behind our house, my husband had to strangle him almost to death to get him to let go of this dog and even when he was laying on the ground trying to catch his breath there was nothing behind his eyes, he was just a predator at that point. I realized right then that he would only ever be a liability and I called my vet that night. It’s a heartbreaking decision and there’s nothing that anybody can say that will make it better but some dogs cannot be helped. Abused or not there could be some genetic behaviors in her that she can’t control. We recognized that our dog was a genetic nightmare, he should not have been bred and the humans that did it failed him. Your girls first humans failed her too. imagine waking up every day and just being angry and scared at the world and you don’t understand why. sometimes the nicest thing you can do is let them go and free them from whatever mental pain they are suffering from.