This 9 March 2016 video from Georgia in the USA says about itself:
The female Great Horned Owl calls to the male, flies off the nest and comes back with a snake from Dad for the chicks.
The Cornell Lab of ornithology writes about this:
The two owlets at the Savannah Great Horned Owl cam have grown immense over the last two weeks, nearly outgrowing the female’s ability to shelter them from the wind and rain. A steady diet of rodents, birds, and even snakes has kept squabbles to a minimum, and over the next week the owlets will be left uncovered for longer periods of time as they begin to thermoregulate more efficiently. Don’t miss the excitement as they begin exploring the nest for themselves—watch cam.