We've been feeding Scarlett & Boomer Fromm Gold Large Breed Puppy food (will continue for another couple of months-they are 10 mos old); have to second the advice on the pumpkin! Worked wonders when both had a problem with stools; my wife gives them a bit in one of their feedings each day.
I had never heard of giving dogs pumpkin, but it sounds like a healthy, inexpensive solution! I will definitely give this a try! Thank you.