Hi my sister said that she feed Misty purina dog chow (not my brand but okay, well I finished that bag and started a new one. At first I didn't think much about it, then I noticed her stools where alittle loose. Then Murrie decided to try Mistys kibble. And oh mh gosh, NEVER again. I have never seen so much yuck. Is this normal or does this brand of food not agree with my dogs? And can I just switch Misty over to Natures Choice? I don't know if I can deal with that again.