---
product_id: 75880306
title: "Merck 2771694 Ultra Boss Pour On"
brand: "merck"
price: "NT$3095"
currency: TWD
in_stock: true
reviews_count: 8
category: "Merck"
url: https://www.desertcart.tw/products/75880306-merck-2771694-ultra-boss-pour-on
store_origin: TW
region: Taiwan
---

# Effective on goats & horses 33.8 fl oz ultra-concentrated Made in USA quality Merck 2771694 Ultra Boss Pour On

**Brand:** merck
**Price:** NT$3095
**Availability:** ✅ In Stock

## Summary

> 🐎 Keep your herd happy and pest-free with Ultra Boss — because your animals deserve the boss treatment!

## Quick Answers

- **What is this?** Merck 2771694 Ultra Boss Pour On by merck
- **How much does it cost?** NT$3095 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/75880306-merck-2771694-ultra-boss-pour-on)

## Best For

- merck enthusiasts

## Why This Product

- Trusted merck brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted & Proven:** 4.6-star rating from 525+ reviews, a summer staple for millennial animal lovers.
- • **Cost-Effective Protection:** Substantially cheaper than competitors like Equi-Spot without sacrificing efficacy on ticks and lice.
- • **Multi-Species Versatility:** Safe and effective for goats, horses, and more—perfect for mixed herds.
- • **Ultra-Concentrated Formula:** Just a few ml covers large animals, stretching your investment longer.
- • **Vet-Recommended Natural Support:** Complements veterinary care with natural ingredients for healthier, happier animals.

## Overview

Merck 2771694 Ultra Boss Pour On is a 33.8 fl oz natural, vet-recommended topical solution made in the USA, designed to protect horses, goats, and other livestock from ticks and lice. Its ultra-concentrated formula requires minimal application, offering cost-effective, multi-species pest control with a strong reputation among millennial animal caretakers.

## Description

The products and techniques are natural and complementary to veterinary medicine. It is not a cure-all, but a wonderful way to keep horses healthy and comfortable in their bodies.

Review: Goats, horses, and more… oh my… it works amazing! - Perks of this are: 1. I can use it on my pet goat (horse companion only without dairy or food animal future) without my livestock vet screaming that it is not food animal approved. I had investigated using dog products like seresto collars and frontline plus/gold prior to finding this on my livestock vet’s firm suggestion. Deer like getting into one of the fields that my horses and goat go into. That means ticks also like being there. My goat had started getting ticks on her and I needed an immediate, quick reacting solution. 2. It can be used on the horses as well if I want to. Even a very large horse requires less than with other products like equi-spot. It is substantially cheaper than equi-spot with it running a few cents compared to several dollar for same treatment period. 3. It takes extremely small amounts to work. In fact a neighbor who has a goat herd is splitting the bottle with me as otherwise it will take me this year and next to use it all. It will take her and I both all this year and potentially into next year’s insect season to use this one bottle even with her treating ten 75 to 100 pound goats along with one 80 pound at my farm and 5 horses totaling just under 4,000 pounds. 4. It takes care of lice on goats amazingly well (neighbor had an issue when she added a newbie to her herd and it cleared it up within hours). Now the bad things: 1. If the animal is sensitive, has allergies, or has the “black coat” issue (some black colored animals have a different texture to their coats), then you may end up with a bald animal where you have applied this due to a chemical type burn. I would suggest using only a portion of this if you have an animal who may have an issue to see prior to using. However, the two black animals which it was applied to (both reacted to it) lost hair on only a portion of the applied line. Whether or not you would see a reaction where you do a test of the product would be questionable. 2. Not easy to apply at all for someone who is not used to doing similar product. I am used to dealing with these sorts of products. I have used them for many years. However when it comes to the volume that needs to be applied per animal and have it go down their topline and down face that’s an issue. I found it super hard for me to even to get the teeny tiny amount of product to go the entire coverage area and I was using a small 3 ml syringe with a dispensing non-sharp 23 gauge tip on it. Literally I had to apply more than suggested in order to do the entire coverage area. This however was not on the two black animals that had the reaction (so extra product did not cause). The animals who had extra amounts applied to did not have any reaction whatsoever. 3. Works but doesn’t work. I found that it was extremely helpful in keeping ticks off of the horses when they went out. However, as far as flies, I didn’t see too much of an improvement in the numbers or types they were being afflicted with. It did keep ticks off of the goats as well. And as mentioned above, the lice attack on my neighbor’s herd disappeared within hours. We are located in an extremely hot and humid area and even in May (although seasonally got warmer faster than usual) was experiencing same issues. 4. Wish that they would approve and put on packaging placement of the product on a horse like equi-spot does. Equi-spot works great but is unbelievably expensive compared to Ultra Boss. The chemicals are not the same as equi-spot is 55% permethrin and Ultra Boss is 5% permethrin plus 5% piperonyl butoxide. I do not see why it could not be used in the same manner as equi-spot with multiple application locations. Perhaps, that would assist in reducing the fly issues which have still remained with the horses. Am I going to keep using it? Yes. For the goats all the time usage will be in their future. For the horses, it is still a trial to see if I will return to equi-spot or continue with Ultra Boss. However, a minimum application of every 14 days is expected in my area.
Review: MillennialMomThoughts - I buy this every summer. Great way to cut down on flies!!

## Features

- The products and techniques are natural and complementary to veterinary medicine
- Merck - Ultra Boss Pour On - qt
- Manufactured in United states

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Merck |
| Customer Reviews | 4.6 out of 5 stars 525 Reviews |
| Item Volume | 946 Milliliters |
| Material | cotton |
| Product Dimensions | 5"L x 21.5"W |
| Sterility Rating | Sterile |
| Unit Count | 1 Count |

## Product Details

- **Brand:** Merck
- **Item Volume:** 946 Milliliters
- **Material:** cotton
- **Product Dimensions:** 5"L x 21.5"W
- **Sterility Rating:** Sterile

## Images

![Merck 2771694 Ultra Boss Pour On - Image 1](https://m.media-amazon.com/images/I/71BHrl1boEL.jpg)
![Merck 2771694 Ultra Boss Pour On - Image 2](https://m.media-amazon.com/images/I/71dA9f3VkOL.jpg)

## Questions & Answers

**Q: How did you apply to your horses? Mix in a spray bottle or pour on?**
A: By Private on June 10, 2021

**Q: Do you mix it 1 dose at a time? You don't have to mix the whole container do you? How do you store it?**
A: You take the lid off of the lid with the reservoir and squeeze the bottle while it fills the reservoir, then you pour the measured dose directly on the back of the large animal.  I use it on my large horses and completely fill the reservoir (30 oz) and start at the withers and pour a straight line across their back to the tale.  I store it at room temperature in my tack room at my stables.  If you wanted to put it on cattle there are larger quantities to be purchased and placed in a giant sprayer and you can spray the cattle as they go thru the squeeze shoot.

**Q: Is it water proof? If I put it on and it rains for a few days, will it still be in affect?**
A: On the bottle, it says not to saddle or wash the horse for six hours after application.  So I wouldn't put it on while it was raining, but it should be o.k. if the horse was dry for the first six hours.  I personally haven't noticed a decrease in effectiveness after a rain shower, but my horses voluntarily come inside when it rains, so they don't really get soaked.

**Q: For those who have used it on horses how long was it effective for flies and ticks.  How soon after first application did you have to apply again?**
A: We don't have ticks too bad so I don't know how they work on those. As for flies, it seemed to take a few hours and then my steers were fly free. It lasted about three weeks and then flies were back.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Goats, horses, and more… oh my… it works amazing!
*by A***M on July 8, 2022*

Perks of this are: 1. I can use it on my pet goat (horse companion only without dairy or food animal future) without my livestock vet screaming that it is not food animal approved. I had investigated using dog products like seresto collars and frontline plus/gold prior to finding this on my livestock vet’s firm suggestion. Deer like getting into one of the fields that my horses and goat go into. That means ticks also like being there. My goat had started getting ticks on her and I needed an immediate, quick reacting solution. 2. It can be used on the horses as well if I want to. Even a very large horse requires less than with other products like equi-spot. It is substantially cheaper than equi-spot with it running a few cents compared to several dollar for same treatment period. 3. It takes extremely small amounts to work. In fact a neighbor who has a goat herd is splitting the bottle with me as otherwise it will take me this year and next to use it all. It will take her and I both all this year and potentially into next year’s insect season to use this one bottle even with her treating ten 75 to 100 pound goats along with one 80 pound at my farm and 5 horses totaling just under 4,000 pounds. 4. It takes care of lice on goats amazingly well (neighbor had an issue when she added a newbie to her herd and it cleared it up within hours). Now the bad things: 1. If the animal is sensitive, has allergies, or has the “black coat” issue (some black colored animals have a different texture to their coats), then you may end up with a bald animal where you have applied this due to a chemical type burn. I would suggest using only a portion of this if you have an animal who may have an issue to see prior to using. However, the two black animals which it was applied to (both reacted to it) lost hair on only a portion of the applied line. Whether or not you would see a reaction where you do a test of the product would be questionable. 2. Not easy to apply at all for someone who is not used to doing similar product. I am used to dealing with these sorts of products. I have used them for many years. However when it comes to the volume that needs to be applied per animal and have it go down their topline and down face that’s an issue. I found it super hard for me to even to get the teeny tiny amount of product to go the entire coverage area and I was using a small 3 ml syringe with a dispensing non-sharp 23 gauge tip on it. Literally I had to apply more than suggested in order to do the entire coverage area. This however was not on the two black animals that had the reaction (so extra product did not cause). The animals who had extra amounts applied to did not have any reaction whatsoever. 3. Works but doesn’t work. I found that it was extremely helpful in keeping ticks off of the horses when they went out. However, as far as flies, I didn’t see too much of an improvement in the numbers or types they were being afflicted with. It did keep ticks off of the goats as well. And as mentioned above, the lice attack on my neighbor’s herd disappeared within hours. We are located in an extremely hot and humid area and even in May (although seasonally got warmer faster than usual) was experiencing same issues. 4. Wish that they would approve and put on packaging placement of the product on a horse like equi-spot does. Equi-spot works great but is unbelievably expensive compared to Ultra Boss. The chemicals are not the same as equi-spot is 55% permethrin and Ultra Boss is 5% permethrin plus 5% piperonyl butoxide. I do not see why it could not be used in the same manner as equi-spot with multiple application locations. Perhaps, that would assist in reducing the fly issues which have still remained with the horses. Am I going to keep using it? Yes. For the goats all the time usage will be in their future. For the horses, it is still a trial to see if I will return to equi-spot or continue with Ultra Boss. However, a minimum application of every 14 days is expected in my area.

### ⭐⭐⭐⭐⭐ MillennialMomThoughts
*by S***Y on December 17, 2025*

I buy this every summer. Great way to cut down on flies!!

### ⭐⭐⭐⭐⭐ Very effective on my Brahman cattle.
*by L***L on May 26, 2025*

Flies are really bad this year. I have tried a variety of products that either don't work at all or don't last. This product works quickly and lasts well. I was able to treat about half of the cows freely in the pasture and that was enough to provide visible fly reduction for the whole herd. Very pleased with it and the price was great.

## Frequently Bought Together

- Merck 2771694 Ultra Boss Pour On
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- Manna Pro Goat Mineral Supplement - Made with Vitamins & Minerals to Support Growth & Development - Contains Ammonium Chloride - Microbial Blend for Digestion - 8 lbs

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-01-26*