The owner isnt prepared to do that though so I think a free to good foster home then help from breed rescue or club is a good suggestion? The thing is would the owner want/do that? I dont know about others but no way could I pretend to someone that I was homing a dog with the intent to then pass that dog to another home....without letting on, so the owner must be on board with that surely?

I really do hope a great home works out for him and they pick someone that is going to be very dedicated.

would they accept help training wise from a rescue? i.e. daughter trained and wife walk dog?

I'm willing to bet this dog can learn that he cannot mouth etc with these people and accept exercise?