I am sure you aren't still looking for an answer, but, I thought I would leave my answer for further reference to anyone who may look here for one. Canned pumpkin! Organic is best & you can buy it @ Walmart, as Great Value carries it. (Not pumpkin pie filling, just pumpkin.) It works both ways, for diarrhea & constipation. Just mix a little in their food while they are in need of it. If they like it, it is good for them to have anytime.