Hi @kilh, I've been using Heather's Tummy Fiber which is said to work for IBS constipation or diarrhea - Here's a link to their website that has a video explaining how it works - https://www.heatherstummycare.com/p/suplmts_acacia-can/tummy-fiber-acacia-senegal-can/.
I haven't found my normal dose yet but it does seem to help. The easiest way to use it is mix it with a moist food but you can mix it with room temp water but you have to follow their directions to help it dissolve better.