OMG, this sounds like Bogey! Truly, I was at my wits end! We tried, Fromms puppy, Fromms beef fritatta, and as soon as we got to 1/2 cup- soft serve at best. As the day went on, more like runny! Then we tried Purevita grain free bison- it is a one protein source food. We did fine for about 2 weeks - poop was firm, but he was still having 7-8 poops a day. But since it was formed, i was ok with this. then, the soft serve started so we had his stool tested AGAIN and it was all negative. Back to bland, stools firmed right up, and decreased to 2-3 times a day. I challenged the Purevita again, and did ok until he gets to 1/2 cup and then soft serve and an increase in amount of poop. So we went back to bland for 1 week, I went with Natures Instinct Lamb Limited ingredient. No potatoes in it at all- the starch is tapioca. So far so good and we are going on week 3. I give him 1/2 cup kibble with 1/2 cup of homemade(lean ground beef and boiled rice) twice a day. He is 6 months old and I have cut out the noon meal- I do give him a snack of cottage cheese, white rice and yogurt at noon. Very small amount. This has been frustrating to say the least. But it's all trial and error. good luck!