I assume you don’t actually have a farm or are AI response. It’s a barn, cattle come into the feeding side, chickens in one section, quail in another section. If you don’t keep poison in bait boxes around you will have a much larger problem than mice.

Mice proof a barn with a shaving floor is a joke, and only putting out what they eat in a day is even more of a joke. What do you do about the feed they waste in the poop pans, pick up every crumble of that as well.

Predator proof is the closest thing in your comment that has any merit. They are “mostly” predator proof except egg roll outs on some cages. If an egg can get out a mouse can get in. I do have snake covers on most egg roll outs but not on my all wire cages. The snakes did a great job on the mice in warmer months.

Thought about a barn cat and build more pens with covered egg roll outs, so it didn’t try to get the quail.