I'm just intrigued to know. When I first started feeding Squiggy, I fed him ONLY grain free. However, he turned his nose up at both Natural Balance and another brand (I can't remember off-hand), and while he ate the Blue Wilderness, it gave him terrible diarrhea. When I switched him to Iams, the diarrhea stopped. I've been feeding him grain-free wet, but he's still extremely gassy and has very stinky poops. (Don't worry, he's been tested for internal parasites and all is clear there. I'm currently using probiotics with him.) Could it be that the grain-free is actually contributing to his stinky gas and poop problem? Thanks in advance!