Suzi did that at Petsmart a couple of weeks ago! I think it was because Ryan our groomer spent so long with her! Suzi was so happy afterwards, and was on her leash, went straight for the doormat, squated and did her thing
after she peed> I was trying to pay for a bully stick , and rushed over to pick her up right in the middle of her potty... Too late! I got to clean up her mess , and get out of there quickly !