Safe Guard Horse and Cattle Dewormer 92 gram contains 10 percent fenbendazole and is formulated to control lungworms stomach worms and intestinal worms in both horses and cattle. This apple flavored paste comes in a convenient calibrated oral syringe that treats up to 4000 pounds of body weight making dosing simple and accurate. It is safe for breeding stock pregnant cows stressed cattle lactating dairy cattle and horses over 1250 pounds providing a dependable solution for maintaining the health and productivity of your animals