I am sorry if this post is redundant... but I did a bunch of searches and couldn't find a situation that was similar enough... I am not sure how to actually search inside the food groups discussions... short of browsing through all 45 pages..
So, we recently changed Darwin from Holistic Select to Blue Buffalo. It was the better choice for numerous reasons, including quality, price, and availability. We changed him gradually, and he did okay for the first week, although his stools were pretty soft. However, a week in, he started having bad diarrhea. I figured this was just due to the change and we put used either white rice or some pumpkin to help his tummy out. They helped, but as soon as we stopped the rice or pumpkin, he was back to explosive diarrhea.
I was confused. We fed him two different formulas of HS, chicken and rice, and lamb and rice. Well, the Blue Buffalo we switched him to was Chicken and Rice... so they had similar ingredients. Was the tummy upset from the food? This went on for THE ENTIRE bag. (a big bag) We had to put pumpkin or rice in his food every single day or he would get the runs. And even with the rice or pumpkin, his poop was soft. He had to go out twice as much as usual. Not at all like it used to be. I was worried he was sick with something because it had lasted through the entire BB bag...
I decided to get a bag of Holistic Select. If his poop went back to normal, it probably meant he wasn't sick and it was the food upsetting him. Well, the 1st day he was back on Holistic Select, his poop was PERFECT again. Without pumpkin or rice. He is currently back on HS.
Any advice? I wouldn't think the differences in the food would be that great, since they were similar formulas... but he didn't do well at all on BB, for the whole bag. Should we try another formula? Should we stick with HS?
UPDATE: We have now completely switched him over to Wellness. It is the "Core" line, grain free. He is doing great. His poop is nice and firm (yay!) and he LOVES it. It is so much more readily available, and a better food so we are happy campers here!