My dog has really soft poops...?

Just give it time. I switched my dogs over to Natural balance LID and they had soft poop for a few weeks but it's just their system getting used to it. If it doesn't go away, consider changing again. Natural Balance, Bison and potato is a phenomenal food and my ten dogs have never had any problems on it what so ever. It's pricey but you feed less of it. It's quality not quantity.