I called the vet and he agreed to see her this morning. He trimmed away the exposed muscle and cartilage, cauterized the wound, and gave her some glucose because she's not eating. I now have instructions on how to maintain circulation in the leg. He doesn't think she could take the shock of losing it.

My vet was amazing as always, but the receptionist gave me some serious **** for bringing in "a FROG? An outside frog? A frog from OUTSIDE?" I think she would have kicked me out if I hadn't called ahead and gotten the vet's permission to come in.