older dog is pretty much predictable, what you see is what you get.
although, you will not be able to enjoy that cute ball of energy, you will have a better idea of the over all personality of your dog and how it will act more on a day to day basis. the dog will be at its full size from the earliest of a year old to three years old, and the crazy chewing and nipping stage is most likely out of the way because they will have all their teeth in. when teaching older dogs a new habit, they are more mind-set and alert on what is going on, 