I started making custom feeder for goats as a hobby. The feeder is 100% metal. It has a feed pan below the hay feeder to minimize hay loss, the pan is pitched to divert water out of the feed to minimize feed loss. The feeder is 8' long, 2' wide.
I can custom make any kind of Ag feeder to your needs. From Metal Manger feeders for your shed to Sheetmetal feeders for your kids.