I have a mid age rescue that has some reactive tendencies. Jeff has worked with her and trained us on how to handle her. Well, things were great and well balanced, until I came across a Great Dane mixed pup that was in need of a home and decided to tip the balance. I was worried that my pit would be reactive to the pup, but on initial encounter she was accepting. Now I have a different problem, truly I have two. One, I have never trained a puppy and have a thousand questions. Two, constant play time that escalates to the point I have the attention of niether dog, and a huge opening for not one, but two agressive dogs. This site is great though! I came for the recall training and found a whole chapter on dog fighting with lots of tools. I figure, if structure works with reactive dogs, then it would work for excited dogs too, right? Taking control of my house hold before the pup is Great Dane size is a must. Wish me luck!