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Bug Check

Natural Horse Vet — Item #10686
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Insect control plus digestive support

  • Garlic, yeast & grape seed extract help deter biting flies
  • Diatomaceous earth helps discourage insect breeding in manure
Bug Check brings you the best of both worlds! Bug Check contains garlic, yeast, and grape seed extract to deter biting flies and diatomaceous earth to discourage insect breeding in manure. Bug Check is chemical free and palatable, with no "spray-on" hassle!

View our Insect Control Supplement Comparison Chart

NOTE: SmartPaks and buckets/bags now contain Alltech Lacto-Sacc Probiotics.


Guaranteed Analysis
(Maintenance Dose = 3/4 scoop (3/4 oz) daily)
Ingredient Per Serving Per Pound
Crude Protein Min 4%
Crude Fat Min 3.5%
Crude Fiber Max 20%
Saccharomyces cerevisiae Min 3.80 x 10(9th) cells/lb
Lactobacillus acidophilus Min 2.10 x 10(8th) cells/lb
Enterococcus faecium Min 1.50 x 10(8th) cells/lb
Ingredients:: Ground Dried Grape & Seed Pomace, Distiller Grains, Diatomaceous Earth, Garlic Powder, Brewers Yeast, Mechanically Extracted Soybean Oil, Thiamine Monohydrate, Saccharomyces cerevisiae yeast culture, Dried Enterococcuc faecium fermentation product, Dried Lactobacillus acidophilus fermentation product, Dried Aspergillus niger fermentation extract, Dried Trichoderma longibrachiatum fermentation extract, Dried Bacillus subtilis fermentation extract.


Instructions for Use:
Feeding Directions:
When starting this product, top dress at the rate of 1 scoop or more daily per 1000 lbs body weight for two to three weeks. Then, maintain an amount of 1/2 scoop or more daily. For difficult situations, up to 4 scoops per 1000 lbs body weight may be given daily. Each scoop (provided) equals 1 oz.

Clinical Research

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    Bug Check is rated 4.1 out of 5 by 278.
    Rated 5 out of 5 by from Love it! Truly the best product on the market! It's the only stuff that works!
    Date published: 2017-07-14
    Rated 5 out of 5 by from Reduces Flies I have three horses and love this product. I have used it for three years and it definitely helps reduce flies. I have one horse in particular who was always covered with flies and bleeding because flies were biting his legs, this does not happen with bug check!
    Date published: 2017-07-05
    Rated 5 out of 5 by from Over the years I have managed health food stores and am still an avid health food nut. When my Schnauzer was still alive I always gave her brewer's yeast supplements to keep the fleas away. I gave my horses them too to help with bugs and ticks. When I saw this fabulous formula I bought it for my trail horse Rocky. I have witnessed him with fewer flies and mosquitos than the other horses in the pasture where I board him. They seem to land and fly away. I will continue to purchase Bug Check not only for the bugs but for all the other nutritional advantages this formula has to offer!!! Thank you Smartpak for offering this supplement to make my horse and others more comfortable during the fly season!
    Date published: 2017-05-24
    Rated 5 out of 5 by from Keeps our coastal bugs away This is the first product that allows our horses not to wear fly apparel everyday or become welted by the annoyance of bug bites.
    Date published: 2017-04-04
    Rated 5 out of 5 by from LOVE IT! I love this. I have purchased this for over 6 months and tried without. Huge difference between being on or off of it.
    Date published: 2016-12-06
    Rated 5 out of 5 by from Bug Check is Amazing Bug Check truly works. We noticed a significant decrease in the amount of flies on the horses after we started feeding Bug Check. The horses like it and it works!!!!!!
    Date published: 2016-09-09
    Rated 5 out of 5 by from Great Product! I have a thin-skinned chestnut who attracts every bug in the world! This year has been the worse even to the point where I had to keep him in during the day behind closed doors with the fan blowing on him. Within a week I noticed a slight difference, and within 2 weeks he could roam around his paddock with just a quick spray and his fly sheet. The bugs hover around him, but not on him! An added perk to this product is the coat condition; shiny with dapples. While this product doesn't eliminate the bug issue, it sure makes it manageable and my horse comfortable again.
    Date published: 2016-08-03
    Rated 4 out of 5 by from Actually works! While I still use fly spray on my horse, he is so much better this summer than last summer and I'm sure it's the Bug Check. Before he would toss his head the entire ride due to bugs and now he hardly does it at all!
    Date published: 2016-08-01
    Rated 5 out of 5 by from It really works!!!!! Bug Check absolutely works to minimize fly's on the horse! Amazing success! Note to Horse Owner - your horse will have Dragon Breath!!!!!!!!!!!
    Date published: 2016-07-05
    Rated 5 out of 5 by from have used before and pleased I have used before and feels it helps more with ticks and fewer flies
    Date published: 2016-06-09
    Rated 4 out of 5 by from Feed Through Bug Control in a Powder Form I am using Bug Check mixed with applesauce and giving it to my horse in an oral paste. He won't eat it in his grain, but since it's a powder form, it mixes well with the fruit sauce. I just started him on Bug Check and hope to notice results in a few weeks.
    Date published: 2016-05-16
    Rated 1 out of 5 by from Waste of money Did not work in the slightest.. Horse didn't like it , had to use fly spray all year.. I want my money back!
    Date published: 2015-11-21
    Rated 4 out of 5 by from Works well Had used this product in the past; but discontinued when some veterinary studies stated a link between garlic and Heinz body anemia in horses. Have re started after discussion with our vet. Seems to work well, especially in conjunction with Spalding fly predators at reducing the fly population at our farm.
    Date published: 2015-10-23
    Rated 5 out of 5 by from Really diminishes flies! I have purchased Bug Check for two years now and it reall does reduce the fly issues in the barn/ stalls.
    Date published: 2015-09-17
    Rated 3 out of 5 by from Not repelling flies going back to simplifly as feedthru. Not working. Flies still all over horses
    Date published: 2015-07-15
    Rated 5 out of 5 by from Works! I have had my horses on this for a few years now, seems to work very well.
    Date published: 2015-07-06
    Rated 4 out of 5 by from Big difference I have used this product for years and I didn't realize how much it helped until one year I didn't use it...big mistake!
    Date published: 2015-06-25
    Rated 3 out of 5 by from Average product Bought this a month ago so it just into my horse's system. The bugs usually dive him crazy. This product seems to keep the edge off him so he is not as reactionary to the flies. However, the bugs still keep after him when it is warm
    Date published: 2015-06-02
    Rated 5 out of 5 by from Bug Check is the Best Do you want to be exposed to less toxic flysprays? Do you want your horses to be happier and less irritated by bugs? Do you want your outside horses to have show quality coats? Feed this. Done.
    Date published: 2015-01-22
    Rated 1 out of 5 by from didn't help product did nothing to stop the bugs biting this horse. Trying the smart pack brand and it seems to be helping
    Date published: 2014-09-23
    Rated 3 out of 5 by from Works Great! It seemed to help my horses a good bit. The difference was crazy to see from before and after they started getting the supplement.
    Date published: 2014-08-25
    Rated 5 out of 5 by from liking the individual smart pack doses. So easy to use
    Date published: 2014-08-18
    Rated 5 out of 5 by from Very good product I have used this product and it is a very good product my only problem is getting the product. We have ordered it twice and it is always back ordered and it doesn't do my horse any good if I can't get the product for him.
    Date published: 2014-08-11
    Rated 2 out of 5 by from May change I bought this for my stanardbred and found it worked somewhat but I would rather use something else the bugs ate really bad where I am so I'm not sure if that's it but I put my donkey on something else which I may switch my standardbred to. My standardbred is always coming in dripping swear and gross and has to be hosed off(I USE MORE FLY SPRAY THAN ANYTHING)
    Date published: 2014-07-26
    Rated 5 out of 5 by from worm free every year I've been using this for about 5 + years, my horse has been worm free every stool check with his annual physical--no worms, no other de-wormers.
    Date published: 2014-07-14
    Rated 5 out of 5 by from Bug Check I live in Fla, known for it mosquitoes and nasty biting flies. I swear by this product. I started it usually in April but began earlier this year because of an outbreak of Pigeon Fever in my area.
    Date published: 2014-06-25
    Rated 5 out of 5 by from Simple and effective I have had my horses on this for just over a month. They are doing great. One horse is allergic to gnats and noseums and he seems to be doing better this year so far with less hair loss and itching
    Date published: 2014-06-18
    Rated 5 out of 5 by from Great Supplement-Bug Check I've been buying this supplement for approx. 5 years. It is difficult to determine how well it works. However, I do know that the horses are only bothered by a few flys instead of swarms despite living across the road from beef cattle. One summer I did switch to a different fly supplement, but promptly switched back the following year. I would recommend Bug Check to everyone.
    Date published: 2014-05-20
    Rated 5 out of 5 by from Love this stuff! I have used this product for a while, and have had great results. The flies only land and don't bite. Obviously others results will differ, dependent on if you have neighbors with livestock who don't use fly control, etc. I feed it to both horses and donkeys. Thankfully all of them eat it right up with their feed, no problems. In fact some don't even have to eat it with something else- I've had some eat it by itself! It does have a strong smell, but the horse's skin doesn't smell like it unless they still have some on their nose from eating. Hope this info is helpful! :)
    Date published: 2014-04-17
    Rated 1 out of 5 by from Not worth it I tried the cheaper stuff and never again. Didn't work like the SmartPak Bugoff.
    Date published: 2013-08-06
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