Calves (baby cattle) receive passive immunity through the intake of colostrum (the first form of milk) provided by their mothers shortly after birth. This important transfer protects them from infection!
Sketch and fact contributed by Rachael Coon
Source: McGee, M., & Earley, B. (2019). Review: passive immunity in beef-suckler calves. Animal, 13(4), 810-825. doi: 10.1017/S1751731118003026