My little girl doesn't lift just one she lifts both of her hind legs

. I didn't think girls did that
She is 16 moths old and she been doing this since I brought her home at 8 weeks. then it was only the one leg and hopping around

Now it is two up and two walking. She leaves a little trail.
When shes done she kicks up the ground

She is just so proud of herself..... Does any other females do this???
Star, Taffy & Baby