Hi outbackdean,
There are people here much better qualified to help you out, but I have a few questions that will make it easier for them anyway.
How much time a day do you spend with your boy?
Does he spend plenty of time inside with you or out side mostly?
How much excersize and mental stimulation does he get daily?
When you are not with him, what has he got to keep him occupied?
Does he like to chase things? (apart from his tail )
Is he a nervous or does anything in particular stress him ?
Do you still do obedience or any other training with him?
Till some one better qualified comes in ( they will) I would be interrupt the behavior whenever I see it, get him to focus on something else, starting with me 1st.( 'cos only I can correct and redirect) try to teach him better ways to cope with what ever is causing this.Basicaly try to give him plenty else to think about.
You describe him as higher drive. What "drives" him most?
Wishing you well with this, must be very upsetting.
To answer your questions
My wife is home with him six out of seven days a week and he goes in and out with her all day.
They do training all through the day with games of tug and flirt pole and walks
Then we also have two teenage boys that play with him doing fetch etc
He loves to play flirt pole and was prone to chase flies when he was younger
If for some reason he is home alone he has bungee tugs and balls and kongs and is given a frozen chicken breast when he is left
Yes he is still going too obedience classes with other dogs
Nothing seemed to upset him before this cropped up three weeks ago , maybe dry loud thunder he has always been so happy and extremely good temperament with both dogs and people
His drive is higher with tugs and flirt but works well for food as we'll
The only other change we have noticed in him now is he is prone to bark at people that he knows like he is unsure of them (like someone has attacked him but we cannot work out when unless someone has tried to break in to the yard)
I hope I have answered your questions and thank you for your concern
Thanking you
Outbackdean