My pup Gracie is 12 weeks now. When I got her both ears tips hung down. About 9 weeks old one ear stood straight up and one still tipped down. About 11 weeks both were up (I had decided to leave them both up). Then two days later the one tipped down again and is still down. My question is, what are the chances that ear will stand again and stay that way? I'd prefer they were both up or both down.