First of all, congrats on your new baby! Sorry if my typing is off but Im holding one of my babies now. He's over 9 years old and very sick, so I was on here looking for possible answers on what to do, since the vet doesn't seem to know. Anyway, back to your question...
I have had 4 prairie dogs, currently 3 and they all liked to do that when they were young. 2 grew out of it and 2 still did once in a while. Some has to do with personality, but a big part is bonding and spending time with your pd. It sounds to me like yours will grow out of it and she's just playing. Sometimes you may have to put her in a time-out. Tell Kiwi no and if she keeps doing it put her in a dark closed off place (with no toys). Just keep her in there for a minute or two. Oh, almost forgot - Don't ever associate time out with their cage/house.
Prairie dogs all each have unique and individual personalities, it's hard to remember sometimes after having one for so long. For example, you said your other pd liked to "play/attack", Kiwi might feel threatened, so she's reacting or trying to tell you no. Maybe that's it, it's hard to tell since you havent had her but a couple of weeks. It's also good to get her a companion. If you do, just make sure you bond with it first; I learned that the hard way when I was still new to having pds. Like I said earlier, a big part of it is that she's young and new with you. She's testing her boundaries right now. I wish you the best of luck!