Sulmet is very hard on chickens. Corid (amprollium) is better tolerated, and will kill more strains of coccidiosis (9) than Sulmet(2). Corid comes in liquid ( 2 tsp) per gallon of water or powder(1 to 1 1/2 tsp ) per gallon of water. Do not give vitamins while on Corid and treat for 5 days.