Val, sorry to hear that you are having problems with your rescue dog. We have two GSDs, both rescue. We got Foggy first, when our other GSD had to be put to sleep for health reasons. When we got Foggy, for the first two weeks he was fine then as I started to introduce him to our way of life, things changed. I learnt that he had been shut away for the first year of his life. He had not been exercised, socialised or trained. It was a very difficult time for us. I had to go right back to basics with him. I would spend 10 minutes at a time, several times a day, working on lead, recall etc. My main worry was his aggression towards other dogs. He would quite happily play then the aggression would kick in. He, fortunately, did no damage, alot of it was noise. I was in a catch 22 situation as how could he be let off lead if I couldn't trust him but how could I show him he didn't have to be aggressive? I found some people, with well behaved dogs, who understood my dilemma and agreed I could walk with them. For the first week I muzzled Foggy and walked twice a day, every day, with these people. Foggy soon learnt that he had been 'accepted' and could play without losing his temper. That was five years ago and he is one of the most loveable dogs I have ever owned. A year later, we took another rescue dog, Mia, who he completely accepted and they love each other. Mia didn't have any real issues, she was only five months old and had been taken into the rescue centre on Christmas Eve because she was a 'monster'. She wasn't, she was a puppy who was doing puppy things, like chewing

. Fortunately, for me, she was very easy to train as she is eager to please.
It really was very hard work but well worth it. You will be disheartened and think to yourself 'what have I done' but I'm sure if you get help and work at it, things can work out. There was a time, after only two weeks, that I thought I couldn't cope and phoned the rescue centre to say I had to bring him back but I lay in bed that night and thought 'it's not his fault, I'm going to add to his problems if I take him back and he will become a yo-yo dog'. I spent alot of the time crying and I'm sure this didn't help. I have owned GSDs for 25 years but had never encountered anything like this. Be strong and think of his good points. He is still very young and has alot of growing up to do. It will take time and I wish you good luck.
Kind regards - June