Before the DNR outlawed feeding of deer in Wisc. I made a gravity type feeder for my property. It held 750 lbs. of corn. Depending on the time of year it would go for several weeks with out needing to be refilled. If cattle are a problem you could fence it off to them and that would take care of that problem. I'm sure you could modify the plans to hold more corn if that is not enough. If interested E-mail me at [email protected] and well figure how to get you some planson it. It's simple and free.