When you buy through our links, Business Insider may earn an affiliate commission. Learn moreThe best hairball remedies for cats include gels, treats, supplements, and foods.Chewy; Savanna Durr/InsiderIt's important to treat and prevent hairballs so they don't cause a dangerous intestinal obstruction. While small amounts of hair usually pass harmlessly through a cat's digestive tract, too much hair can ball up and become trapped inside the stomach.