I don't know... I'm to dumb to know better but if the fox showed no outward signs of disease . foam/ blood in mouth, diarrhea on the southbound fur. Missing patches of fur etc.
Then hell, I sure wouldn't eat it but I'd skin it. Atleast take the tail.
Wear gloves, salt it and let it sit a while.
If your spouse loves you , you can even use the washing machine. Then salt it.
Maybe some kid in the neighborhood got a BB gun for Christmas.
Kevin