One thing she has taken to doing, though, is lying in the doorsill just below Sassy's pet door. She hasn't figured out how to operate the thing herself, or maybe she's just not big enough yet to break the magnetic hold and operate it herself. So, there she waits, either enjoying the cool draft or hoping to sneak out when Sassy barges through; I'm not sure.
Caught in the draft? Waiting by a very large mousehole? Trying to find the code for the stargate?