We have had our beautiful white german sheppard since she was a pup. It was her birthday the other week and she is actually my brothers dog and they live in my mums house. She gets very very very excited when anyone comes to the house and goes nuts! Not in an aggressive way, in a very hyper, jumps over the baby gate (We bought a bigger dog gate this week) and jumps up at you. She is just very excitable. How do we teach her to calm down?