I would suggest finding a behaviourist that uses Positive reinforcement.
Stay as far away from barkbusters as possible. They really have no Idea what they are doing. They use terrible "techniques" and try to supress the issues instead of actually dealing with them.
I would like to send you a personal message but you need more posts before I can do that.
OMG, they seriously recommended you throw a pillow at him
(No fault of your own. I just seriously despise barkbusters)