OHIO ANIMAL

Here's a strange creature reported from the 19th Century.  The witness was one G.G. Hubbard.  He described it as being built like a fox, colored white, with a black spot on its head.  Yet it moved like a cat and had a bushy tail.  It had no trouble in fending off one of Hubbard's dogs, which it knocked to one side with its head.  So, what was it?  Suggestions are welcome.  As I don't have a picture of this creature, below you will find a picture of me in puzzlement.