Slippery Elm always works for my kitties. I give them both half a cap mixed in water & into a feeding syringe. 2 X a week.
OP is from
12/18...I have questions re: SEB. I replied to that thread and cut/pasted to todays thread. Hope that's ok
Sorry for the long post

I'm very interested in a natural way to keep the boys regular.
When I switched them to canned food, I began adding water to the food to make it soupy. Enough water in their diet shouldn't be the issue.
I gave Miralax as needed. I tried giving Miralax as a "supplement" every other day to promote normal BMs(that didn't last long

).
I gave pumpkin for 2 consecutive days..1/2 teaspoon every meal(plus 2 snacks) for a total of 1 tablespoon on day 1. On day 2, I only gave 1 tsp pumpkin. I read kitties can get use to the laxative effect when given daily. Peeps on the board concurred. So, I discontinued the pumpkin.
I bought a bag of Dr. Elsey's clean protein dry. It has 3x the amount of fiber compared to the canned food. It is also low in carbs. The bag sits here unopened. I was discouraged, by the board, about giving Ittle a small amount everyday for the added fiber.
I even grow cat grass and add it to their breakfast...for the added fiber.
I truly believe the problem is fiber. While on dry cat food, the boys always had regular healthy BMs. This dry and scant BM problem didn't begin until they went on canned food only. When Ittle did the walking poo with no success, that terrified me. Fecal impactions are no joke.
Miralax and pumpkin both worked. Both kitties produced healthy BMs the following day. The problem is you can't give Miralax and pumpkin regularly, to keep kitties regular. So, you have to end up waiting until you see a problem and treat. I want to prevent the problem. I'm so frustrated.
So, my questions for you are about the SEB. You give it twice weekly. Do your kitties have issues with constipation? Do they have smallish, firm, dry stools? If so, does the SEB keep them regular(daily normal BMs)? How long have you been using it? Have you noticed it having the opposite effect and causing constipation(I've read it can)? Where do you get your SEB? You give 1/2 cap....is there different strengths? If you don't mind pointing me to some info, I'd appreciate it tremendously! TIA