I wouldn't worry too much, unless it looks like she is really going to hurt herself. You aren't forcing her to run! My 6 month old puppy still slips and slides all over the hardwood and looks like he is having a blast. You should try trimming the fur between her foot pads, if it looks long. The fur could be getting between her pads and the floor and decreasing her traction.
I suppose you could also try a foot cream like Musher's Secret which helps dogs on ice and snow. I'm not sure if that would make it better or worse. My old dog wore protective boots while hiking, but a puppy might be more interested in chewing them off if she wore them all the time. I'm sure she would get used to boots or socks after a little while.
Oso: born May 22, 2013