Wonderful. I love the idea of a ferocious zombie sheep. The little biohazard posters are just perfect.
Of course sheep do sometimes eat birds http://news.nationalgeographic.com/news/2003/08/0825_030825_carnivorousdeer.html
Bob Furness, a seabird ecologist at the University of Glasgow in Scotland, is among a handful of scientists worldwide to have researched bird predation by deer. He has also studied bird-eating sheep, on Foula in the Shetland Islands.
His observations revealed that Foula's sheep target unfledged Arctic terns. In years when the island's tern colony was at its largest, more than 200 chicks were found with amputations characteristic of sheep attacks. Ewes were also seen turning over chicks in the nest before biting off their legs.