Dunkin Brands Group Inc. (DNKN) is doing well, for now. 

But with notorious short-seller Jim Chanos hot on its heels and sales slowing, it might be time to start flirting with JAB Holding Co.

It wouldn't be the first time that Dunkin' and the German company spoke about a sale, but this time, Dunkin' should be serious. JAB, which owns Panera Bread and other coffee brands, makes sense as a home for Dunkin'.