you can mix the bran and butter together as a treat.
I keep the Psyllium husks on hand and mix with my cats food once and a
while for when he gets his "problem."
Tigger has IBS; so I go thru this quite often.
Also... instead of spending a lot (well not so much) you can use this
instead of buying laxatives... plain petroleum jelly. IF you give your
cat a laxative, make sure it does NOT contain the preservative sodium
benzoate or benzoate of soda.
make sure to give laxative gel 2 hours before or after a meal. Never with
a meal.
One can find Psyllium husks at the Natural food store or GNC.
Lots of luck!
Tan