4 Reviews
$34.99 to $299.99


Farnam's SimpliFly is a feed supplement for horses that prevents stable and house flies from living in your horse's manure. This supplement concludes the life cycle of fly larvae by impeding their exoskeleton's formation, ultimately killing any potential new larvae. SimpliFly is considered a reduced risk pesticide, making it safe to use for pest management. 


  • Eliminates flies by breaking their life cycle
  • Used as an added supplement to grain
  • Prevents development of house and stable flies
  • Safe to use for pest management efforts 


Mix in with daily grain meals. Start feeding in the spring before the flies appear, continue until cold weather. Not for use in pregnant mares or stallions. Dosage recommendations based on weight are as follows:

300-500 lb: feed 2/5 oz. per day
500-700 lb: feed 3/5 oz. per day
700-900 lb: feed 4/5 oz. per day
900-1100 lb: feed 1 oz. per day
1100-1300 lb: feed 1 1/5 oz. per day

For horses over 1300 lb or draft horses: feed an additional 1/5 oz. for each additional 200 lbs of body weight. 


Keep out of reach of children. Feed the recommended portion. Store in a cool, dry location. Not intended for use in any other livestock.


Diflubenzuron, Wheat Middlings, Dehydrated Alfalfa Meal, Calcium Carbonate, Sodium Chloride, Calcium Propionate (preservative)

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4 reviews