Chipotle Mexican Grill (CMG.N) has retained two leading food safety experts – including a critic of the burrito chain’s early response to disease outbreaks last year – as it redoubles its efforts to guard against health scares… “If I had to put together a dream team to fix something, you could do a lot worse,” said Don Schaffner, a food science professor at Rutgers University. But, he added: “I’ve begun to wonder a little bit about too many cooks. Each of those guys is going to have a perspective on what to do to fix the problem.”