Legs Like Springs

Juicy has the most uncanny ability to spring. In fact, I'd be hard pressed to affirm her being on four legs as much as she is on two. Lately she's taken to springing either upward from her rear legs when in a standing position or straight up and at you from four legs when she can't get your attention. Of course her persistence in getting your attention is another matter altogether. From pawing madly at my leg like she was digging her way to China to barking fiercely to springing like a jackrabbit. I wonder more often than not, did her breeder really give me a dog? I have my doubts....