@Kat & Trixie
I did a search on our board just recently for another member about this and found this posted by a few members
I was searching around and found this posted by one of the moderators
Be careful with psyllium. Kitty has to be drinking enough water or it can make the constipation worse.
Found this also posted by a member
I also use psyllium husk 2.5 pinches 2x daily
NOW Supplements, Psyllium Husk...
https://www.amazon.com/dp/B002RWUNYM?ref=ppx_pop_mob_ap_share
Another member said
I started with a pinch for a few days. Too much to start can cause bloating.
I got plain psyllium husk powder at a vitamin/supplement store.