She is a pup and what you are going though is normal. One thing you need to remember with bullies is that they will ponder/contemplate the instruction you have given to determine how it will benefit them before doing as you asked. When she is doing something you don't want her to do in the yard you need to redirect her attention to a toy or another area of the yard. Same goes for the biting. She is in the shark baby phase so you need to redirect there as well to something that is ok for her to chew on like a Nylabone or Kong. The biggest thing is that you need to be persistent and consistent with this and it will get better... It just takes time. My Harlea just turned one earlier this month and she still plays the decision gave with many things I ask her to do.