Rodents are everywhere and I'm losing feed and grain
Three things, in this order: close the holes, store feed in metal, and get a predator working for you. Poison is the one option that actively destroys the best solution you had.
What actually works
If a pencil fits, a mouse fits. Copper mesh or steel wool first, then seal — foam alone is chewed through in a night.
A roll of hardware cloth and an afternoonA nesting pair takes 1,000–3,000 rodents a season, needs no power, and sends no invoice.
$50–150Secondary poisoning kills the owls, hawks and farm dogs doing the work for free. You can't run bait and an owl box on the same property.
The owls, the hawks, the barn cats, and sometimes the dogNo stacked wood, no pallets against the wall, no tall grass. Cover is how they get there unobserved.
Trigger toward the wall. Cheap, effective, and no secondary poisoning.
Also searched as
mice everywhere · rats in the barn · rodent control farm · mouse poison · rats eating chicken feed · rodent proof · barn owl box