Sorry to hear about the problems you are experiencing.
Have you had help from a behaviourist? The book Emma Parsons Click to Calm Healing the aggressive dog may be useful for you.
I did get a behaviourist in for about 4 months but couldn't afford it any longer. She managed to get Joey to everything she asked of him but couldn't get past the unpredictable behaviour of people and the mad aggression he show to every kind of dog but not my other dog. I know it wont happen over night but iv'e had him a good 6 months now and that part of him hasn't changed one bit . But as a New dog i think he has progressed in lots of ways But he has six years of bad habits to break . If he never left the house again he would be perfect. Healing and reki might be an avenue i could try. Thank you
I think youv'e 'hit the nail on the head' iyswim
6 yrs is a very, very long time in the dog world.
Another thing that might help is if you could find someone to walk with that has a very laid back, non confrontational dog, that just might help build his confidence & eventually he will realise that not all other dogs are a threat
It may take much, much longer for Joey to begin to be a little more relaxed meeting other dogs & it might be you will just have to manage each individual situation.
Nina my 5yr old girl doesn't like other dogs (exc. our other 3 in the home) but there are several reasons for that.....she had a couple of scary experiences with other dogs when she was younger & on top of that she has been going blind for many months now, which causes her to be startled with dogs/humans approaching.
However she will now walk quite happily with a friend's visla, who is a very laid back dog that just ignores her.