Sentry Hairball Relief
Active Ingredients: Mineral Oil (10.8%), Petrolatum (32.8%).
Other Ingredients: Acacia Gum, Acidified Calcium Sulfate, Barley Malt Syrup, Caramel, Glycerin, Potassium Sorbate, Sodium Benzoate, Thiamine HCl, Water.
Sentry Petromalt Petroleum-Free Hairball Relief
Ingredients: Soybean Oil, Hydrogenated Vegetable Oil, Cod Liver Oil, Flaxseed Oil, Vitamin E, Sorbitol, Soy Protein, Poultry Flavor, Lecithin, Tuna Flavor, Beeswax, Maple Flavor, Methylcellulose, Chamomile.
One theory of why cats get hairballs
Your cat grooms herself frequently, licking her fur right down to the tip of her tail. While this fastidious cleaning improves her appearance, it creates yet another problem: disposal of the wet, ingested hair commonly referred to as a hairball.
Your cat's hair does not pass easily through her gastrointestinal tract, nor can her stomach and pancreatic enzymes digest it. Normally, most of the hair she swallows is expelled in her stool. Problems occur, however, when her hair doesn't get excreted, and instead forms into a dense hairball, or mat, in her stomach. Your cat must now vomit the hairball, usually in a fit of disturbing coughing and choking.