Date published: 2025-9-12

1-800-457-3801

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Ultra Boss®

by Merck
4.7(15)
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Pour-on insecticide for cattle, sheep, goats and horses
    • Insecticide for horses, cattle, sheep and goats
    • Controls flies, mosquitos, ticks, lice and sheep keds
    • Provides effective horn fly control for up to 8 weeks
    • May be used on lactating cows and goats
Catalog #DescriptionPriceQtyAutoshipCARTFAVORITES
sc-364895
1 quart
$41.95
sc-551565
5 L
$189.95
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Ultra Boss® is a pour-on insecticide for use on lactating and non-lactating dairy cattle, beef cattle, calves, sheep, lactating and non-lactating goats, and horses. Controls horn flies, face flies, horse flies, stable flies, black flies, mosquitoes, lice and ticks. Use on sheep to control lice and keds. No pre-slaughter withdrawal and no milk discard. Contains permethrin and piperonyl butoxide. One quart will treat 57 head of 550 lb cattle. Pour on gun sold separately.

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How long do you need to avoid the area on the animal after applying ultra boss? We like to love on our animals but we don’t want to get the stuff on us. 

Asked by: Goatmama
We would suggest reaching out to the manufacturer for your concerns. Thank you, SCAH Team
Answered by: Mandy
Date published: 2024-01-02

I use your product on my miniature pet cows. Can I use Utra Boss on our pet potbelly pigs for fly control ? I like idea of pour on versus spray that might be longer lasting.but not sure if this is safe for pigs as you do not list them? Please advise 

Asked by: Renee
Hello Renee, The Ultra Boss Pour-on Insecticide is labeled by the manufacturer for Cattle, Sheep, Goats, and Horses. We cannot recommend any off-label use of this product. Thank you, SCAH
Answered by: Mandy
Date published: 2023-06-20

We have a pot belly pig that is 163!lbs and lives in the barn with our goats and big pigs- can we use ultrabiss for her as well?

Asked by: Rayann
Hello, This product is labeled for Cattle,Horses, Sheep and Goats. We recommend reaching out to the manufacturer regarding using this on a pig. Thank you, SCAHealth
Answered by: SCAH Representative
Date published: 2023-04-28

Hello,  Is this product safe to use on pregnant goats? 

Asked by: hannah
Hello, This product is designed to be used safely of lactating cows and goats. for information on afe use in pregnant animals we recommend consulting with a veterinarian or reaching out to the manufacturer. Thank you, SCAHealth
Answered by: SCAH Representative
Date published: 2024-03-28

I have 2 bltl fed mini Nubian goats. No fly problem currently (SE Feb weather in TX). When fly season starts can I used this on them if they’re still small. I did read dosage based on ‘per 50#’ … wanna make sure goats aren’t TOO young/small to use?!

Asked by: Domesticated Barn Mama
Hello, Per the product label: Apply 1.5 mL per 50 lbs body weight of animal up to a maximum of 18 mL for any one animal. Pour along back and down face.
Answered by: SCAH Representative
Date published: 2022-02-21

Does Ultraboss control mites on goats?

Asked by: Griffey
Thank you for inquiring with Santa Cruz Animal Health. Ultra Boss is labelled for lactating and non-lactating dairy goats to target Lice, Horn flies, Face flies. It aids in the control of Horse flies, Stable flies, Mosquitoes, Black flies, and Ticks.
Answered by: SCAH Rep
Date published: 2024-07-26

I noticed that it was listed as safe for other species, but is Ultra Boss safe for use in pregnant and lactating mares? Thanks!

Asked by: jpdraft
Hello! This product is safe for lactating mares, but safe use on pregnant mares has not been proven
Answered by: SCAH Rep
Date published: 2020-06-03

Hello, I was wondering if the UltraBoss lice insecticide is safe from lactating ewes?

Asked by: Lorrie
Hello! This product can be used on lactating animals. No pre-slaughter withdrawal and no milk discard is needed.
Answered by: SCAH Rep
Date published: 2020-03-02
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Rated 4 out of 5 by from Really easy to use pour-onReally easy to use pour-on, I had great results last year.
Date published: 2014-04-29
Rated 5 out of 5 by from Works great for ticksWe have a bad tick problem. I researched what would work the best on our horses and found Ultra Boss pour on. So far I have tried it on 4 of the horses. I used a syringe to more evenly apply the pour on and it worked great. I have a boarder who checks her horse every other day and she said she was removing over 40 ticks each time. I put Ultra Boss on her horse last week. Yesterday when she checked there were only 3 ticks. I am very happy, I tried the product a last resort and was pleasantly surprised.
Date published: 2022-05-31
Rated 5 out of 5 by from The best thing for your livestock!I recommend ultra boss for your donkeys/equine and goats. It works great for flies, ticks, lice ect. I pour it on their back then hand wipe it on faces/legs. I have used it for years and there is nothing better or easier that i have found. You will not find a tick on your animals! This is the cheepest place i have found to get it. I just ordered more from them and it came yesterday already!
Date published: 2017-06-29
Rated 5 out of 5 by from My goats coats are back softMy goats fur were rough and kinda of hacky looking so we used ultraboss and they look great. No more lice!!
Date published: 2017-03-14
Rated 5 out of 5 by from Excellent product and it WORKS! Super easy to giveSaw this product on a Dr.Pol episode, so I ordered it and love it. Very easy to administer and easy to read dosage instructions. Even gives goat and sheep dosages. I just walked out with the bottle and syringe while they were eating and squeezed it right down there back. A quart will last forever!! Fleas ticks lice and horn flied up to 8 weeks!
Date published: 2017-02-24
Rated 5 out of 5 by from Effective productI use this on my goats. The product works well and I have recommended it to fellow goat owners. It is wonderful to have with a sick goat during the summer to eliminate flies that try to gather on the animal. I do use this product year round to get rid of external parasites. Very easy to use.
Date published: 2019-07-11
Rated 5 out of 5 by from Used for years and always effective!I have purchased ultra boss over the years for mainely ticks, flies and lice on goats and equine. It works great and lasts about 2 weeks in dry weather. You do need to reapply after the first treatment for lice but that is normal with any treatment. Very effective for ticks and helps with flies. I will be buying again!
Date published: 2019-07-29
Rated 5 out of 5 by from Easy and EffectiveI use this on my five horses. Its easy to just pour on and go. Easy self measuring spout. Seems to keep the flies and ticks at bay. I would highly recommend.
Date published: 2017-06-06
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Ultra Boss is rated 4.8 out of 5 by 20.
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