It also contains Psyllium seed husk powder, a soluble fiber, which helps move hairballs through the digestive tract. (1800petmeds.com)
As well, Hairball Plus Chews for Cats contains Psyllium seed husk powder to help ease the movement of ingested fur through your cat's digestive tract. (1800petmeds.com)
You can buy powdered psyllium seed husks at health food stores without the sweeteners and dyes found in drugstore products. (mychiaseeds.com)