Could they not just served fish instead, until the chicken problem is resolved?
"Chicken shortage shuts KFC restaurants across Britain and Ireland"
KFC said that more than 700 of its 900 UK-wide chicken shops had been forced to close since the weekend, while others were offering a downsized menu or shorter opening hours.
http://www.news.com.au/lifestyle/food/chicken-shortage-shuts-kfc-restaurants-across-britain-and-ireland/news-story/532130c851434ba182df8c39d7a1e962
(I prefer my home cooked meals. KFC *and fired foods) ... not my thing!!)