Recommended dose is 5 mg fenbendazole per kg body weight (2.27mg fenbendazole per pound) in a one a day treatment.
For ascarids the recommended dose is 10 mg fenbendazole per kg body weight (4.54 mg fenbendazole per pound) in a one a day treatment.
All horses much be eating normally to ensure that each animal consumes an adequate amount of the medicated feed.