I think your question is totally reasonable.
I feel like I remember the rules saying somewhere that outside the mouse and the weasel families, other animals have basically no culture and very rudimentary communication ability. If I’m remembering that right, then a fox could be cunning in its actions, but would not be verbally cunning - something like, either a fox could not have a real verbal negotiation in the way you describe, or else its level 7 Nature would manifest as a non-verbal move in the conflict. Basically, sort of along the lines of, “Let the Wookie win.” Similarly with a moose, it gets to use its whole 12 nature because if the negotiation fails badly, the moose could potentially demolish several mouse settlements before anyone could do anything about it.
That, at least, is how I read/remember the rules. I could definitely be wrong.
Even if I am right, it would still be good for the game to give some more concrete ideas about how to interpret the different types of conflicts for the different types of animals (or for us to at least help each other with coming up with plausible options).