Once after a long walk with my friend and our dogs, we stopped at her house for a break, but because when we're in the house the dogs knock stuff over, I put my dog outside while my friend brought her dog into the house. My friends dog continued to run to the front door whinning and barking. When we finally opened the door to see what was the matter I found my dog outside sitting on the porch. We still to this day can't figure out how she got out. My friends dog never gets out, weird.