Legs were weak at first, but have recovered over the week. His energy has returned too, and he's more like himself. But he's remained incontinent, and appears to have no sensation or control over his tail - it's limp.
Our escapee came back after a night with this worrisome injury, and we're trying to make sense of it. We welcome any insights! (Yes, we are scheduled for the next available vet-specialist appointment, but that is days away...)