How do great horned owls get their food?
They catch it.
mostly because snowies are among the larger and more powerful owls and it would be very difficult for a Great Horned to hunt one. Great horned owls are sort of famous for being 'cannibals' and eating other owls, but Snowy owls are quite large for owls, and they are in fact larger than Great Horned owls. when hunting for food, owls usually wont try to attack anything larger than themselves.