Purina(R) Calf Growena(R) Feed boosts early rumen development... helps speed growth...is balanced with protein and energy for earlier freshening...provides overall savings. Feed Calf Growena(R) from 2 months through 6 months of age. High protein, high energy, vitamin and mineral fortified. Balances hay to keep your cost low. Promotes rumen development with excellent performance. | Purina Calf Growena Feed | Size 50 lbs