Irene Jiang / Business Insider Popeyes’ new chicken sandwich kicked off a Twitter battle between fast-food brands. Chick-fil-A, Wendy’s, Shake Shack, and Church’s Chicken have taken to Twitter to defend the superiority of their chicken sandwiches. Bojangles’ also tweeted that its chicken biscuit was better than any chicken sandwich — but deleted the tweet. Chicken […]