I found a dog on Monday night (In the rain! Poor puppy!). She had a collar, but no tag. My parents took her because they have a big yard/more time to take care of her. We've put up ads online, around the neighborhood, and taken her to a vet to check and see if she had a chip. So far, no luck.
My parents have fallen in love with her. How long should we wait before my parents claim her as theirs?