Milo is a favorite with many Western ground-feeding birds. On Cornell Lab of Ornithology seed preference tests, Steller’s Jays, Curve-billed Thrashers, and Gambel’s Quails prefer milo to sunflower. In another study, House Sparrows did not like milo, but cowbirds did.
Milo should be scattered on the ground or on low tray feeders. Stop offering it if you’re subsidizing cowbirds.