I'll never forget when Lucy was little. I used to keep her in a baby's playpen when I went to work. I came home one day and she met me at the door! She was SO happy with herself because she'd "escaped"!
I had the same thing happen when Rebel was a puppy - he also escaped. (I think Lucy encouraged him

)
After that, they both spent the days in an x-pen for a while, but after I moved into this house and put down laminate floors - they have the run of the front part of the house during the day. They both use peepee pads, but Rebel has a problem hitting his mark sometimes.
He backs around in a circle when he poops and sometimes I think he makes himself dizzy because he misses the pad by an INCH!
Gotta love those yorkies!