The sheep will soon turn into zombies en masse and here is what it will look like...

People will suddenly have "catatonic" spells in which they are unable to have normal motor functions or speech. Then they will be suddenly fine, but it will come back again. This will infect much of the population and zombies will be like the elderly and disabled and will need round the clock care. The economy will cave before or after this, but definitely after. This will be a plague. Many of you are already infected and it is beginning to show.