My wife and I have been looking for a watchdog, and came across a 107lb. Black Lab/ Golden Retriever cross who's 3 years old. He's a good boy with some training who's coming over to live Sunday. The problem is now the wife feels scared of the dog, even though he's well behaved and shows no aggression issues. This from a woman who's always had dogs (bred and showed her own too). Shed, What do I do @Stevie???