Julz- I havent had aggression issues with Tino, but I have always used the positive reinforcement method with hom regarding everything...barking, potty training and I have no problems with him at all and I think its bc of the positive method. All they want to do is please, so when you ignore them that is way worse and lasts longer than hitting/tapping... I really think they probably think its part of a playing game.
Sophiedog- what you do is exactly what I do, like Julz mentioned its the positive reinforcement method and I think there is a lot to be said for it! BC once they realize that the naughty behavior isnt going to get them love or attention, they will find some way to get what they want!
I think time outs are great... I have heard that they work for children even though I don't have any skin kids... I never used this method bc Tino would have ruined my bathroom door by trying to dig a hold through the floor to get out!
