SimpliFly Feed-Thru Fly Control

Item #0029502

$23.99 to $249.99

$75.99 to $249.99

SimpliFly Feed-Thru Fly Control

SimpliFly Fly Control is a palatable feed additive to prevent the development of stable flies and house flies in the manure of treated horses. Reduces fly population by 97-100%. Read More

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Fighting Flies With Farnam

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SimpliFly Feed-Thru Fly Control with LarvaStop™

SimpliFly® Feed-Thru Fly Control is a palatable feed additive to prevent the development of stable flies and house flies in the manure of treated horses. This product contains no organophosphates and can be used as a part of your pest management program.LarvaStop™ breaks the fly life cycle by preventing the formation of the larvae's exoskeleton when they molt (resulting in their death). Reduces fly populations by 97-100%.SimpliFly® with LarvaStopTM is a reduced risk pesticide.

SimpliFly® Feed-Thru Fly Control Benefits:

  • prevents 97-100% of house and stable flies from developing into biting, breeding adults
  • contains exclusive active ingredient, LarvaStop - Fly Growth Regulator
  • proven effective in university studies
  • contains no organophosphates
  • pellets with an Alfalfa scent
  • highly palatable - just add to feed

SimpliFly® Dosage:

  • 300-500 lb - Feed 2/5 oz per day. (fill to blue line)
  • 500-700 lb - Feed 3/5 oz per day. (fill to red line)
  • 700-900 lb - Feed 4/5 oz per day. (fill to green line)
  • 900-1100 lb - Feed 1 oz per day. (full measuring cup)

Start feeding in early Spring and continue through the Summer.

View manufacturer and/or label information


  • Brand: Farnam
  • Form: Pellets
  • Ingredients: Dimilim
  • Size: 3.75 lb
  • Servings: 64

Reviews (15)

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  1. 5.0 out of 5 stars

    "It really helps reduce the fly population and Moose is less bothered with flies - and his pasture coat is nice and shiny."

    Worth the money and combined with a fly mask with ears are a super duper duo.

  2. 4.0 out of 5 stars

    "Seems to be helping"

    I was desperate to get these flies under control this year. I use Fly Eliminators nearly year round, and keep my barn and pasture picked up twice a day. This year has been so bad. In desperation I got this and it’s been right at 3 weeks and things are much better. I’ll keep them on it through the summer!

  3. 5.0 out of 5 stars

    "Destroys flies"

    Flies are few and far between now that I’ve put my horse and mini donkey on this product. Fly season is long here in South, so it’s fed most of the year. But it works well for me.

  4. 5.0 out of 5 stars


    This stuff is amazing! I can tell a HUGE difference! My horses will always be on this during the "fly months".

  5. 5.0 out of 5 stars


    I've used this for five years and find it highly successful for fly control. I live in a climate where I have barn pests almost year round and this works for me very well.

  6. 5.0 out of 5 stars


    I have 6 horses and in the past years the flies has really become bothersome. I tried using other products but my horses are to smart and they would not eat their feed if they sense the other product in it BUT with Simplifly I do not have any problem with them eating, I can feed it straight out of my hand and they will not turn it down. I started noticing a difference in the flies in 3 weeks of feeding. I would do a commercial for this product, it really does work and well worth the money. My horses are much happier now. I would recommend this highly.

  7. 5.0 out of 5 stars


    Works great keeps flies down and horses eat it with their feed.

  8. 5.0 out of 5 stars


    It's the best!!! Have used it for 8 years and can tell the difference from friends who do not use! Mix w dry feed and eat right up.

  9. 4.0 out of 5 stars

    "Bye Bye Fly"

    "I've used this product for 2 full yrs and will continue to use it. You must continued to practice good manure and soiled hay (etc.) control in addition to using this product. Important note: I found I had to use the product in my a.m. and p.m. feedings to get the ""no flies"" results I was looking for. Otherwise, I did continue to have a few flies (I'm just fly intolerant!). If you live in a semi-winter region, DO NOT STOP USING the product as advised. Use year 'round. Also, if you are in close proximity of farms loaded with flies and especially cattle, expect those flies to invade your place. This product is not a barrier. It is most effective on more or less isolated--or nearly so--barn areas. Hope someone has found this review to be helpful."

  10. 5.0 out of 5 stars

    "It Works"

    I've tried a number of different products and this is absolutely the best. My horse is so intelligent she knows where to go to get away from the flies which is in the barn. During heavy fly periods she spends the day inside the barn and comes out to graze at night. Amazing to see that even the pasture is very low in the fly population. Great Product !!!

  11. 5.0 out of 5 stars

    "SimpliFly = SIMPLE solution"

    This stuff works amazingly well! Takes about 3 weeks, but then NO FLIES! The difference in my barn and my friend's barn is like night and day. He doesn't use this supplement and I see tons of biting flies/house flies there. At my barn, NONE! Worth every penny and even my pickiest eaters don't even notice! Great product!

  12. 5.0 out of 5 stars

    "SimpliFly Works"

    Really didn't think anything would work to kill the flies. This does ! We could tell a difference in the pasture after about 3 weeks. Horses don't even know they are helping get rid of the fly problem. Easy to feed, no real smell. I'm a repeat customer for this product for as long as I have horses.

  13. 5.0 out of 5 stars


    AMAZING!!! Even my most finiky eater will eat it. I've tried predator flies, other feed throughs and this by far is the best solution to our fly issue. Totally worth every cent! I'll use it from now on.

  14. 5.0 out of 5 stars


    Best control I have come across. The cost per horse is savings in your pocket. I am a return user.

  15. 4.0 out of 5 stars

    "Great stuff"

    This will be my 6th yr using, did miss one year and won't do that again! Works to control on my farm 70% or better...woth every penny.

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