My dog wimpers when I leave the room. She probly only misses u. My dog marley gets mad because he knows I'm still up and doing my going to bed routine

best bet is to keep up going outside. If she's not potty trained, then she will be. Um, as for the owners, you've probably done everything you can about it. If no one shows up then I guess she's yours.
finding out the breed, even mixed would help you out alot as well. You have to know what you're dealing with to be with a dog, every breed is different. and she sounds realllllyy small. With pupps, I give Marley three small meals a day. Only leave the food on the floor for 15 minutes or so, you don't want to develope the habit of grazing.