Vetasyl Fiber Capsules contain 100% natural fiber source, which includes Psyllium and Barley. Encourages natural elimination without the aid of chemicals, while providing a gentle, effective relief from constipation. Convenient, easy-to-administer. Cats spend a significant part of their lives cleaning and grooming. Often swallowing their hairballs and creating a blockage – hairballs. This can interfere with digestion and elimination. VETASYL works wonders! Just sprinkle on your cats food.