Effective Horn Fly Control with SmartLic Supplements

Horn flies cost cattle producers over $1 billion annually, reducing weight gains, reproductive performance, and overall herd health. SmartLic® Supplements with Altosid® IGR provide a proven, feed-through solution to break the horn fly life cycle—before they become biting adults.

How SmartLic
with Altosid Works

✔ Prevents Horn Fly Development – Altosid IGR passes through cattle into manure, where it disrupts the fly life cycle, stopping adult flies before they emerge.

✔ No Resistance Issues – (S)-methoprene, the active ingredient in Altosid, has been used for decades without a single verified case of resistance.

✔ Convenient, Low-Moisture Block – SmartLic Supplements provide consistent intake of essential nutrients and fly control—no extra labor or handling required.

✔ Boosts Cattle Performance – Reduce fly irritation, improve grazing behavior, and help increase weight gains for a healthier, more productive herd.

Altosid® is a registered trademark of Wellmark International, also known as Central Life Sciences®.

The Cost of Horn Flies

Without effective control, horn flies can:

Feed on cattle 20-40 times each per day, causes stress and blood loss.

Reduce weaning weights by up to 25 pounds.

Decrease growth rates in replacement heifers by up to 14%.

Cut daily weight gains in yearlings & stockers by 0.2 lbs per day.

DON’T LET HORN FLIES TAKE A BITE OUT OF YOUR PROFITS!