Merck Animal HealthZeranol implantStimulates weight gainImproves feed efficiency24 dose007-1411900Ralgro is a brand of zeranol implants from Merck Animal Health. Zeranol is an anabolic agent, which stimulates weight gain and improves feed efficiency in pasture and feedyard cattle.Zeranol stimulates the pituitary gland of the animal to produce increased amounts of somatotropin, the animal's own natural growth-promoting agent.Ralgro implants are packaged in round cartridges containing 24 doses. Each dose is three small pellets containing 12mg of zeranol in each pellet for a total of 36mg of zeranol in each dose. The dose is the same for heifers, steers and calves.Suckling beef calvesGrowing beef cattleFeedlot heifers and steersRalgro implants are not approved for use in dairy cattle, veal calves or bulls intended for reproduction. ralgro.com/