I have 2pugs, a french bulldog and a great dane, had chihuahuas, fox terriers, rotts, boxer and doberman in the past.
As MM said these are NOT common dogs, as per food, I'd recommend Taste of the Wild since they have a high protein salmon based formula that will help you because these dogs have a much higher paced metabolism than other dogs, they will have training issues unless you VERY clearly show/prove yourself as Alpha and they will fight you on it so be very patient... these dogs can not sit on a couch and mope they have to be thoroughly exercised or walked at least 1-2 times a day.