Animal Health

Growth Implants


  • Ralgro is a brand of zeranol implants from Merck Animal Health. Zeranol is an anabolic agent, which stimulates weight gain and improves feed efficiency in cattle.
  • Weaning weights of both steer and heifer calves have been increased 20 to 35 pounds.
  • Weights of growing cattle on pasture have been increased 25 to 30 pounds.
  • Feedlot cattle have added an extra 40 to 45 pounds during normal feeding periods, with 10 percent improvement in feed conversion.*