Thank you for the responses. This past summer Tessa came over and she didn't realize the screen door was closed and ran right through it to go out into the back yard!!! (it made the screen come off the track, it didn't tear the screen) And she was much smaller back then too. It didn't slow her down at all. By the time we realized what happened her and Zoee were running laps around the backyard. LOL
Last night I would check on them in the backyard and Zoee would be laying on the lawn panting while Tessa bounced back and forth over her back. Tess is just full of energy!! I was surprised Zoee got tired so quickly. She has finally found someone who is more hyper than she is. hee hee