Hey, we're happy to hear you enjoy the game!
I'm pretty sure every unit in the game consumes 1 food per 10 seconds at the moment.
Thanks for your suggestions. We're adding all suggestions in a backlog to consider, and we'll at least consider adding a tooltip that tells you how much food all your villagers versus your army are consuming. We might also look into how we can better show what the difference food production ratios actually means.
Thanks again!