Separate anxiety pup

Hello vets, I would like to introduce you to my very handsome 8 year old man Dixon. Before I ask for the help let me give you a little back story. Dixon was 6 weeks when I got him, he had spent 23 hours a day in a large size kennel with mastiff. They posted a picture about him buying a foot of a chicken and his so to be death. Well I got him and have had him ever since. I have been told he has severe separation anxiety. They had him on fluoxetine, and tranzadon. He gets extremelyl, and out of control unless he trust the people he's with which isn't much at all. Anyways I've tried kenneling him but he has so much PTSD from it he will break the kennel to get out I know crazy but I 4 broken ones to prove it. I try leaving him out to free roam and he pisses all over the house. I tried leaving him outside destroys the siding of the house. Basically all of that was to show he does not like feeling trapped or alone (human) I have 4 other dogs. He is constantly trying to bite everyone that comes into the house so he has to be muzzled which I think triggers him because he sits there almost life less or tries really hard to tare it off.... Anyways I'm so sorry for my rambling I just don't know what to do with my boy. I was once told giving him to some other family might help but he's my baby. I really hope you guys can give my advice or direction... Thank you

Hello - it sounds as though you are trying to do something extremely difficult, the equivalent perhaps of drying a piece of tissue-paper in the rain.  You have a dog with strong attachments to people who is living in a household where you seem to require him to be calm on his own;  he has anxiety issues with other dogs and yet is in an environment where he has to live with a group of them.  Of course, this runs a high risk of feeding and worsening his anxiety.  I would love to recommend a trainer who could solve this problem for you, but I can't.  This dog needs an environment sensitive to the damage that has occurred, ideally without other animals and with someone who is prepared to put in a lot of time, patience and love.  It possibly can be done, but such people - who do not have dogs already - are hard to come by.  Where abouts in the world are you?  What can you do to trace someone? - we would recommend being honest with them about the situation as it stands; he should not go to a home with elderly people or children, for example.  I don't think that there is necessarily 'something wrong' with your dog, simply the way that they have reacted against a situation that has been extremely traumatic for them - and they are now scared of bad things happening to them and react as though something negative is going to happen, even though that clearly isn't your own attention at all.  It can take time, love and patience to put right and most dogs presenting like this will struggle with anxieties in some form or another form going forward.  I hope that you find someone who can help this troubled baby.

For example, there is no such thing in my opinion as an 'aggressive dog.'  However, dogs can behave aggressively when they are fearful and something that scares them is coming onto their territory.  These behaviours, once learned, can take time, love and energy to unpick.  It would be hard to do it in a household with four other dogs and constantly putting a muzzle on a dog that hates to be muzzled sounds to be a welfare issue to me.

That is, not to say that it isn't the safest thing to do in the immediate term, but that a long-term solution might including not keeping the dog in a situation with which they cannot cope.