Rory does this too! We make a big production of using her pad especially since we had a regression just after her first birthday (I think it had to do with my sister's dog coming to stay with us for an extended period of time). Anyways, she squats, and we immediately jump up with the "Good girl, Rory, good girl!" She stands up and low and behold there is nothing on the pad. Little stinker! Luckily, she'll stand up before she gets her treat for the fake potty, and we can "bust" her.
If she does use her pad and it just so happens that we don't see it, she will run over to us and bark and run back to her pad. It's almost like she is saying "SEE! See what a good girl I am! Give me my treat you neglectful parents."
I think these yorkies are too smart for their own good!
