Oops, I meant to hit reply. Thanks for the information. I have two follow-up questions:
1. What is it about the peanut butter that likely caused the diarrhea? The fat? So, is this probably a matter of "overserving"?
2. Why do you recommend that I change up his regular diet to chicken and white rice? I.e., why wouldn't it suffice for me to just stop or reduce the peanut butter?