Astro has been on "Iams Large Breed Puppy" since we got him at 4 months old. He did good on it for a while, and then around 6-7 months of age we noticed some soft stool. We thought he just had an upset stomach so we gave him some boiled chicken and rice for about 48 hours. His stool became formed again but after we gradually put him back on his regular food, his stool then became soft again. I took him to the vet and she ran a fecal on him which came back negative so she put him on "Eukanuba Low Residue Puppy" for about 1 month. That food seemed to work really well and his stool went back to normal. So the vet recommended we gradually put him back on the Iams. He has been fine up until now. He seems to have soft stool again and more frequently. Now he will go "poop" outside and within a half hour he will "poop" again in his crate. I'm pretty sure the Iams isn't sitting well in his stomach and I was wondering if anyone had any suggestions as to what is a good food for sensitive stomachs. Thanks for any advice.