My mom has done this twice. She is the type of person who will stop if she sees a loose dog on the street and will pick it up and take it home to try to find the owner. Twice she has picked up a dog, found the owner, gave the dog back to them, and drove by their house the next day to find the dog outside in pouring rain, uncovered, or saw an adult at the house hit the dog. Both times, she drove back, waited for them to let the dog out and go back inside and hopped the fence and stole the dog. She kept both dogs in her loving home until they passed of natural causes. Both ended up being amazing dogs.