I LOVE Fromm. Like LOVE LOVE LOVE the stuff. I had a Great Dane and it was the best food for gas and proper growth (if a Mastiff or a Dane grows too quickly they'll have all sorts of issues from knuckling over - where their knuckle bones grow too quickly and literally grow over the front of their toes -- to hip problems / pain during growth etc) and it has always been a fantastic food. It's not nearly as rich as some of the other foods out there (that can cause copious amounts of gas) and gives a good source of protein as well as being grain free.
Sorry, I promise to stop my sales tactics