hi all ,we recently rescued a young yorkie from a sanctuary were he had been left by his own ,he is 2 in june and was in an awful state when we got him ,he has settled in but mostly every time we go out he has a piddle at the door ,he is great at night and during the day when we are at home or bed ,he is really nervous and piddles if you shout at him and shakes ,we know he was badly treated in his previous home please can some one help