An e-collar can work, but to be fair to the dog he will need to go through an introduction that can take a couple of weeks. I like how Lou Castle introduces the collar.
http://www.loucastle.com/articles.htm
Just remember that if done wrong the e-collar may fix the problem short term, but it could also make a huge mess and make the problem worse. You might also email Lou and see if he can give you some help. He does or use to work PSD.
I would also work on teaching the dog that outing brings good things by waiting him out and then rewarding him for outing with a quick rebite or game.
http://www.loucastle.com/articles.htm
Just remember that if done wrong the e-collar may fix the problem short term, but it could also make a huge mess and make the problem worse. You might also email Lou and see if he can give you some help. He does or use to work PSD.
I would also work on teaching the dog that outing brings good things by waiting him out and then rewarding him for outing with a quick rebite or game.