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Feedmark Horse supplements
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Picture of Fly Formula™

Fly Formula™

Repel irritating flies and insects from the inside out

115 reviews. 4.8 / 5
FREE NEXT DAY DELIVERY*
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Your Fly Formula™ will be better and cheaper in a Bespoke All-in-One™...

From £21.26 for a 450 kg horse, Good Body Condition in Medium Work

Fly Formula™

Repel irritating flies and insects from the inside out

115 reviews. 4.8 / 5
Kate - 03/05/2023 14:26
Helps reduce the reaction to fly bites rather than the number of flies
Guest - 26/04/2023 17:25
This product smells and looks so good I’d eat it! Horses love it.. Have started using it before the fly season really starts so it is well in their system so hopefully they will benefit in the summer.
Guest - 15/03/2023 08:33
Have using this for a few years now, works great doesn't eliminate all the flies from my horse but he has far less on him than others in his field.
Guest - 01/03/2023 20:15
Gets in to system quick as the fly seem to be around
Allison - 19/02/2023 12:24
I have used this the last few years to reduce the effects of biting insects. Palatable and effective.
Louise - 13/02/2023 13:32
Definitely helps with the flies but doesn't stop them bothering the horses altogether!
Rebecca - 12/12/2022 19:50
Top quality ingredients lovely smell and texture
Linda - 30/10/2022 19:29
Excellent, effective product. I use from early March through to October and my pony has not had any reactions to fly bites this year.
Lyn - 17/08/2022 21:52
Fly Formula is a lovely mixture of herbs which smell lovely and is very palatable to the horses. My horses never seem to get bitten by flies like the  other horses although the flies do land on him. I have used Fly Formula for years now, always making use of the special offers from Feedmark to keep my stocks up.
Angela - 17/08/2022 21:36
4 Horses on yard...Mine is the only one that has this and the only one that has doesn't have loads of flys 😊
Trusted Feefo Customer - 27/07/2022 20:16
I have a pony that is very sensitive to flies and their bites. He has calmed down since using this product  by not being so worried by the flies.
Allison - 20/07/2022 22:06
Works well on all of my horses
Trusted Feefo Customer - 13/07/2022 20:30
Great product. Only 4 rather than 5 as slow delivery.
Trusted Feefo Customer - 07/07/2022 21:00
Seems to be stopping my 2 from being bitten as much, still get them flying round but not so many bites
Trusted Feefo Customer - 03/07/2022 21:36
This product works a treat, doesn't deter every fly  
but certainly makes a huge difference.
Trusted Feefo Customer - 03/07/2022 21:36
Excellent, great product 👍😀
Trusted Feefo Customer - 16/06/2022 08:15
I have definately noticed less flies on my horse since using this product !
Trusted Feefo Customer - 15/06/2022 20:13
Excellent product hardly any flies landing on my horse so a stress free summer ahead
Jane - 02/06/2022 17:57
Excellent sure it helps my 2 are on it all year
Trusted Feefo Customer - 26/05/2022 12:53
Brilliant product does what it says on packet
Trusted Feefo Customer - 26/05/2022 02:17
I tried it last year , but only for one month at the end of summer.as there was such a good offer on I have bought enough for both horses to start them on the formula early
Trusted Feefo Customer - 28/04/2022 12:35
It's a very strong smelling supplement so hopefully will help repel the nasties. I've only just started feeding it so yet to look out for the results but the horses are all gobbling it up so it's definitely palatable which is great.
Barbara - 18/04/2022 21:14
Smelt promising.  Started with small dose gradually increasing until required recommend does met.   Don't know how long it takes to get into the system but after three weeks still about the same number of flies bothering horses.
Trusted Feefo Customer - 10/04/2022 23:31
Used this last year and it helped wth the  reduction of fly bites my horse had, making him  more comfortable when ridden
Trusted Feefo Customer - 07/02/2022 04:03
Have used this last fly season worked pretty well on my horse definitely made him more comfortable.
Allison - 08/01/2022 13:26
Continues to provide a good deterrent to most creepy crawlies
Sharon - 09/12/2021 14:19
Repeat Order.Says it all really I suppose! My "Go To" item for deterring those nasty flies. Helps with maintaning a lovely shiny coat too! Lovely herby smell and comes in an eco friendly refill bag.
Sharon - 26/11/2021 09:24
Rated 5 Stars. Says it all really don't you think!
Ben - 26/09/2021 20:11
Has helped loads this summer deterring flys and bugs
Victoria - 08/09/2021 20:17
I am using less fly spray, both my boys are troubled less by the flies since I have been using this supplement.  I have saved a fortune in fly spray and less horse fly bites.. Great product.
Trusted Feefo Customer - 22/08/2021 21:22
Smells lovely and my horse likes the taste
Delia - 14/08/2021 19:06
Ponies took to it straight away, lovely herbie smell and seems to be helping with flies.
Trusted Feefo Customer - 09/08/2021 08:27
These herbal formulas are really palatable for the horse. He doesn’t really suffer from flies as much as the others around him.
Trusted Feefo Customer - 07/08/2021 11:58
Been using this for a while now, my boy definitely has less flies on him now than some if the other horses in his field.
Elaine - 05/08/2021 07:15
So far so good- only been using for a couple of weeks- very palatable-my horse hasn’t seemed  to of noticed it being added- we haven’t had as many flies as the weather has got cooler so can’t give a truthful opinion if it works or not
Jane - 04/08/2021 21:22
Smells good horse likes it just waiting to see if it reduces flies round my lad
Grahame - 04/08/2021 21:17
Super item that works!
Recommended.
Trusted Feefo Customer - 04/08/2021 20:39
Very palatable & think it’s helping my 2
Janet - 07/07/2021 21:02
Great products, my pony loves the supplements and it’s helping to keep the flies away.
Trusted Feefo Customer - 24/06/2021 10:05
Fantastic product seems to be helping with my horses sweet itch and only been using it for a few weeks his coat is amazing ,just started my mare on it as shes been attacked by horse flies..Smells gorgeous to!!!
Best part bought while the 25% offer was on.
Allison - 24/06/2021 08:15
This product seems to deter most biting insects and reduces the need for extra protection with sprays.
Trusted Feefo Customer - 23/06/2021 21:09
Smells great and the horses love it
Trusted Feefo Customer - 23/06/2021 20:38
Brilliant, does exactly what is says on the tin
Allison - 31/05/2021 21:49
This product seems to help keep most irritating flying insects at bay
Trusted Feefo Customer - 27/05/2021 05:44
Seems to do the job far less fly's around my boy although fly season not fully under way yet..
Duncan - 26/05/2021 22:23
Palatable and does exactly what it suggests it will.
Trusted Feefo Customer - 16/04/2021 08:37
It sems to be very effective against most bugs
Trusted Feefo Customer - 21/03/2021 20:31
Used it last year, seems to help a bit
Trusted Feefo Customer - 20/03/2021 15:03
Only been using for a week to build up before fly season starts, so far so good for a fussy feeder every morsel of feed gone so can only be good in my eyes. Lets hope it works!!
Allison - 01/03/2021 18:41
Palatable and horses enjoy it in their feeds
Judith - 08/02/2021 16:19
quick and freshly delivered
Allison - 31/12/2020 13:53
Effective against most pests
Allison - 23/11/2020 20:03
easy to feed and palatable, effective
Christine - 19/10/2020 22:56
Horses much calmer in fields now they’re not bothered by flies also very palliative formula they still eat up their feedstocks
Norma - 23/08/2020 21:36
Bought this as flys so bad this year, worked in 2 of my horses but not for ither two unfortunately.
Trusted Feefo Customer - 07/08/2020 19:23
Fantastic product, works amazingly
Trusted Feefo Customer - 22/07/2020 22:30
Produkt wird gerne gefressen, ich mische es mit rote Bete Chips und Handvoll grünhafer
Helen - 20/07/2020 09:06
It helps,doesn't stop all flies but i think it helps
Jacqui - 15/07/2020 22:31
A great blend of herbs and garlic. Horses love it so feed to all of mine for the summer
Trusted Feefo Customer - 10/07/2020 08:24
it Works very well,no flys
Sammy - 08/07/2020 22:07
Works really well, cost effective and seems very palatable
Sue - 08/07/2020 20:56
Still awaiting full results for this product
Trusted Feefo Customer - 02/07/2020 08:24
Fly formula definitely seems to help to protect our horse. He has been on for three summers now and definitely doesn’t get bitten as much. Plus he also loves the taste !
Norma - 29/06/2020 10:41
Seems to work well on one pony but not so great on other, so not sure yet!
Trusted Feefo Customer - 16/06/2020 17:54
Now on my second tub with my three horses. It’s made a difference with the flies and helping their coats too. Whilst they still have flies around them it’s far less than without the supplement. Very palatable too.
Trusted Feefo Customer - 13/06/2020 14:02
Fly formula smells lovely..
Have only used it for two weeks so can’t really comment on how well it is working on my very sensitive mare. But optimistic as I use other feed mark products and found them good
Kathy - 04/06/2020 06:03
It's fly time, trying for the first time, so far so good
Helen - 04/06/2020 00:06
It's good stuff and it works
Leila - 03/06/2020 13:21
Feedmark is always reliable and delivers quickly.I used to be able to delay myBespoke supplement(when it was Formulate) but I no longer can.
Trusted Feefo Customer - 28/05/2020 07:03
The formula smells amazing and my horse enjoys it
Trusted Feefo Customer - 27/05/2020 22:13
Palatable not sure of efficacy yet
Very happy with CPlus that gets a 5 star from me
Norma - 26/05/2020 23:56
Only just started using this having not used before so don’t know just how well will work, but very happy all 4 ponies eating it well so great start.
amanda - 26/05/2020 09:00
like the fact it is herbs and is added to feed
Trusted Feefo Customer - 24/05/2020 20:38
Before fly formula my horse would come in dripping with blood from the dinosaur horse flies. Use every year now and helps keep the flies down, and ticks too
Lyn - 20/05/2020 23:08
Good product which seems to work against the biting creatures and is very palatable for the horse. Smells lovely as well.
- 20/05/2020 21:54
I have used fly formula previously with great results.
Helen - 20/05/2020 21:07
Horses like the mix of herbs, waiting to see the results
Paula - 20/05/2020 20:24
Have used fly formula for two weeks now. the recent hot muggy weather has produced an abundance of flies and midges. The supplement really worked well for two yearlings. So impressed with this product I have arranged for a tub to be sent to Spain for my daughter to trial there.
Helen - 14/05/2020 08:18
I didn't really think this would work,but it did
Trusted Feefo Customer - 14/05/2020 07:43
Been using for six months. This summer will be the proper test to see if the product makes my mare more comfortable
Wendy - 10/05/2020 20:24
First tub, not been using long enough to give an informed opinionof it's effectiveness. Very strong smell which has meant my horses are taking a time to get used to it.
Denise - 06/05/2020 20:27
Palatable for my fussy boy and does what it says
Beverley - 03/05/2020 21:29
I've found Fly Formula an effective deterrent against flies and biting insects. My pony finds it very palatable. Highly recommend this product
Trusted Feefo Customer - 30/04/2020 08:18
Have been using this product for 3 years now on our chestnut horse who used to get bitten badly by flies. We start using in early April and use through to about October and it really does help. We don’t have to use anywhere as much fly spray ,
Helen - 23/04/2020 07:48
It's great stuff but stinks
Trusted Feefo Customer - 22/04/2020 21:14
Feed this all year round to help an itchy pony, not a complete deterrent but mosses are far worse when not fed
heather - 04/03/2020 19:56
Doesn’t stop all flying insects but it definitely makes a big difference in helping keep the pests away
Barbara - 29/01/2020 14:19
Started my horse on this in good time I hope to try to prevent/ ease his reaction to fly bites as the milder weather arrives.
Trusted Feefo Customer - 21/08/2019 20:08
Definitely helps to deter the flys from my thin skinned thoroughbred
Trusted Feefo Customer - 08/08/2019 13:47
Amazing products that do what they say they do
Josephine - 07/08/2019 17:56
Great product to use and horses love it
amanda - 24/07/2019 20:32
like the different herbs in the formula. never had any problems in any of my horses eating it in their feed.
Sylvia - 22/07/2019 23:43
Excellent
Joanne - 21/07/2019 14:25
An important part of my horse’s defence against sweet itch. Wouldn’t be without it from March to November.
Trusted Feefo Customer - 10/07/2019 10:31
Fly formula, wouldn't be with out it, love it, it does keep the fly away, my horse has white legs and without fly formula you can see wher the flys have bitten him,
Kay - 12/05/2019 21:12
Only just started using this product so need more time to see if it works.
Trusted Feefo Customer - 08/05/2019 20:20
Helps keep the flies at bay and the horses really like the taste
Barbara - 08/05/2019 18:03
So far so good, no flies, happy horse
Nicky - 08/05/2019 16:21
Has benefits of more than just garlic. Use on a horse with a midge allergy.
Trusted Feefo Customer - 08/05/2019 14:27
Only just started using the fly formula and it has rained ever since so time will tell.
Trusted Feefo Customer - 08/05/2019 14:16
Excellent
Linda - 27/04/2019 16:41
Smells divine and contains ingredients that help to discourage flies.
Not effective against horseflies but is anything?
Trusted Feefo Customer - 21/04/2019 12:40
Have used each summer for several years and is very good. If fact all that they do is great. My cob is permanently on liquorice and cough has improved.
- 17/04/2019 19:57
Great product & even better when used with a voucher code!
Lorraine - 05/04/2019 16:39
I have not received it yet because I have only just ordered it, However I have used it before and found it to be very effective
amanda - 27/03/2019 18:09
have used this for years and found together with fly spray to be effective.
Trusted Feefo Customer - 25/03/2019 10:54
Been buying it for a few  years now,  wouldn't be with out it, it works very well.
Rebecca - 21/03/2019 11:16
Been fantastic for the last four Summers, but this year my mare wouldn't eat it.
Trusted Feefo Customer - 15/02/2019 10:43
Saved me oodles of time spraying the beast last summer - smelled much more palatable than pure garlic
Joanne - 01/08/2018 12:39
My horse has mild sweet itch and his previous owner used this product to help control it. Having used Feedmark products in the past I was more than happy to continue to use it and I’m pleased that the quality of product met my expectations.
Trusted Feefo Customer - 14/05/2018 20:15
Fly Formula is doing it's job as he is not being bothered at present and his coat has got a better shine
Tracy - 13/05/2018 10:56
I use this every year as its the only thing that helps my horse with the flies
Alison - 09/04/2018 13:07
great product highly recommended
Josephine - 19/10/2017 15:39
Excellent product, my horse loves it.
Trusted Feefo Customer - 14/10/2017 11:18
Brilliant Product, brilliant service
Lyn - 09/10/2017 13:16
Good stuff. The flies land but do not seem to bite. I have used this for several summers on a thin skinned Chestnut TB and on a hairy piebald cob. We have pigs on the farm nearby so lots of flies

Nutrition Information

Fly Formula™is an oral fly deterring supplement, designed to reduce irritation from flies. When ingested on a daily basis, the pungent aroma of the ingredients passes through the skin to discourage flies.

Garlic granules contain a Sulphur compound, which is secreted through the skin. Insects taste via their feet, and those landing on the horse dislike this Sulphur, and so are less likely to bite the horse. The added Fenugreek seeds potentiate this effect, and along with other aromatic herbs known to be disliked by insects, such as Lemon peel, Peppermint and Rosemary, help to repel unwanted attention. In addition to this, ingredients that optimise skin health, such as Chamomile, Nettle, and Linseed help to soothe any areas affected by pesky flies. The proven probiotic, Yea-Sacc®, ensures maximum absorption of the desired nutrients.

Composition

Garlic granules, Micronised linseed, Mint leaves, Rosemary leaves, Lemon peel, Chamomile flowers, Fenugreek seeds, Nettle leaves, Peppermint powder.

Additives

  Additive number per kg
Digestive enhancers    
Yea-Sacc live yeast (Saccharomyces cerevisiae CBS 493.94) 4a1704 5,300,000,000cfu

Analytical

Crude protein 18.4%
Crude oils & fats 8.3%
Crude fibre  8.8%
Crude ash 5.1%
Sodium  <0.1%

Feeding Guide

 

Weight of Horse/Pony         Amount per day                                              
Up to 250kg 1 scoop
250kg - 400kg 1 ½ scoops
400kg - 600kg 2 scoops
Over 600kg 2 ½ scoops

 

1 level (50ml) scoop of Fly Formula™weighs approximately 23.5g

Feed supplements should be fed according to body weight. Introduce to the horse's diet gradually, splitting between feeds (when applicable).

Fly Formula™is a complementary feeding stuff for equine animals. Feedmark uses nothing in the formulation of this product that contravenes competition rules.

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