Sending him to a trainer doesn't train the family. It sounds like the dog isn't the issue, but what's happening in the home. He may well be a high-drive dog placed in a family dog home. A HUGE mistake and mis-match! Have you spoken to the breeder about the problems you're having... if you got him from a breeder? If I were in your position, I'd be asking the trainer you had for him to find him a more appropriate home. If not, you need your family to take classes WITH the dog so your family can be trained how to handle him and how to meet his needs. It sounds like his energy needs aren't being met, and he doesn't have the mental stimulation he needs. He sounds like a dog that would do well in some sort of club or activity on a regular basis after your family learns how to handle him.
Wrath of Grim z Dragon
"Mr. Grim"- Threaten my handler. I dare you.