Just a final thought here, but if the wildlife authorities say no, then they will take the animal to a rehabilitation center or somewhere else where it could get treatment. There's tons of stories like this, even one that happened to a relative of mine where she was allowed to care for the animal until other, proper, arrangements were made. She'd said it was wild (both the experience and the animal), but since she'd worked with the DNR in her area in the past, they had no issues and complete trust in her after giving some tips on caring for it. I don't remember what it was, only that it was a land-based predator and that she normally raised fish for some nearby lakes/rivers and had a small, private, chicken operation.