I just switched to Nautral Balance and he really likes it. I actually had to switch cold turkey because I thought I had a few days worth at my bf's in a container. When I ran out of food at mouth apartment and went to get some at his house, his container was gone.
Luckily he didn't have any problems when I switched, no runny stool or stomach aches. He's been gobbling it up rite away since I switched.