Here's my theory. There's a mondegreen in the song, but I'm not sure where. The line "In the field fleet stubble this pussy did lie" sounds pretty strange. What's a "field fleet stubble?" Did it once sound something like "in the field she did stumble and this pussy did lie?" Just guessing. I believe "pussy" is a common name for the fox.

I also believe that the term "Monagin" is a term for a Mondegreen in a fox hunging song ("Monagin, moffagin"), or it is on this recording. It's an intentional mondegreen of the word "mondegreen."