Who says you can't teach an old dog new tricks? Well... my dog is 6 so I must be talking about myself. We have a very smart Boarder Collie mix who previously thought she ran the house and everyone in it. It became more obvious when we lost our twelve year old Weimaraner in February. She started demonstrating signs of separation anxiety. Marlene and Howard worked with us on some simple commands to start taking the responsibility of pack leader. Belle responded very quickly. She tests us constantly but we have seen significant improvement in leash aggression, relaxed leash walking, barking and jumping when someone comes to the door. The separation anxiety is improved too but a slower process to completely fix. We couldn't be happier with the results thus far and we would never bring another dog in to our home without applying these training techniques. I wouldn't hesitate to bring Marlene and Howard back in for future training! Thanks!!