To follow your nose means to trust one's instinct, which is what you would need to do in order to find fresh food.
Context: If you want fresh food, just go with your gut feeling and you will find villagers happy to sell or trade what they have.
Hypothesis: If you want fresh food, just follow your noses and you will find villagers happy to sell or trade what they have.

Is the hypothesis incorrect? (Yes, no, or unknown)?