Late to the party about this, but I'm so happy to hear that Frodo doesn't need surgery. My Sam had a similar problem, but he ended up having surgery, what I jokingly called his "sex change." I think leaving Frodo at the vet hospital over the weekend is the right choice because should he need further treatment, you won't have to rush him back. And think of how much you can spoil him when he gets home. :-D