He’s really changed since your visit. He is really chilling out, we’ve had no pee incident recently and we have now been able to gradually re-introduce him to the living room again. He is now able to come in and behave himself at least half the time without tethering at all (which is a massive improvement already).
We’ve been taking him to the dog park every day without fail and he loves it, runs and runs with the other dogs and has made some definite friends there. In the street he now mostly ignores people apart from on the odd occasion but still is crazy if he sees other dogs (crazy to play with them that is). He now gets far less excited and far less easily – haven’t had any incidents of excessively hard mouthing or wide-eyed-crazy-dog for quite some time.