What are two ways that Napoleon leads the outside world to believe that food is plentiful on the farm?

Napoleon uses Propaganda to create an illusion of abundance on the farm by commissioning the sheep to chant slogans that emphasize prosperity and plenty. He also holds public events and feasts where food is displayed ostentatiously, even if the actual supplies are dwindling, to showcase a façade of success and well-being to both the animals and any external visitors.