(Merck) Safe-Guard EZ Scoop Medicated Dewormer for Swine is a Type B medicated feed. Three day treatment regimen for the removal of roundworms, nodular worms, whipworms, small stomach worms, kidneyworms, and lungworms from swine. Contains 1.8% fenbendazole. To use, mix 1 scoop (included) of premix with each sow's ration once daily for 3 days or can be mixed into ration for large groups. One 10 lb bucket will worm 50 sows weighing 400 lbs. each. No withdrawal time.