Has anyone used an in-home private dog trainer? And if so which one/how did it go? My 6 month old Saint Bernard puppy is becoming really boisterous and hard to control, we tried puppy preschool but he gets too exited around other dogs and completely loses focus. (Also can't desex him - which we know would calm him down, until 18 months due to him being a giant breed dog). We really need help as we have a baby on the way!!