Luna met kitties

I visited my friends' place the other day. They got two kitties recently. They met a dog for the first time.

In the beginning, kitties and Luna are not sure about each other. Luna never had a cat friend. After 30 minutes, a kitty started playing with Luna...
http://ldt.stanford.edu/~chicando/luna/luna-kitty.mpg

Please turn your speaker on and listen what my friend said. You will know what's happening. :)