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Support calm behaviour and muscle function

37 reviews. 4.9 / 5
Sue - 05/09/2021 20:32
The quality is consistently good
Patrina - 28/04/2021 20:20
Excellent product, great help for my very anxious horse
Trusted Feefo Customer - 03/02/2021 19:11
Great product my boy seems much more settled.
Trusted Feefo Customer - 02/12/2020 13:19
Been using No Fill for a couple of years, really does make a difference to filled legs.
Patrina - 19/10/2020 20:32
Good product, it keeps my very anxious horse on a fairly even keel
Trusted Feefo Customer - 20/08/2020 12:04
I buy this product regularly and it continues to be top quality.
Trusted Feefo Customer - 05/08/2020 20:50
I feel this is an Excellent product that is competition legal and helps take the edge off nervous or spooky horses
Trusted Feefo Customer - 28/06/2020 20:52
As advertised and quick delivery
Adelle - 25/06/2020 22:16
Great company ...not had product long so cant review that yet
J M - 11/06/2020 06:55
Useful supplement for young stock.
Helen - 20/05/2020 21:19
Did exactly what I bought it for!!
Trusted Feefo Customer - 16/05/2020 18:50
High quality product as usual
Joy - 29/04/2020 20:30
I can’t rate fully as I’ve not used it long enough to see results. Everything fine so far.
Barbara Jane - 27/04/2020 13:44
After my previous calmer was "improved" I noticed my horse reverting back to being spooky again so bought your magnesium and what a difference in 2 days, back to normal.
Trusted Feefo Customer - 19/03/2020 09:37
Use it on my lively mare and it works.
Lesley - 12/01/2020 15:53
super service great product , easy to use website and fast delivery.
Joanna - 27/12/2019 13:22
Helps to take the edge off my mare so she's more pleasant to ride.
Sue - 30/10/2019 19:44
a good quality product well packaged
Trusted Feefo Customer - 30/10/2019 10:59
Best equivalent product..
Dawn - 13/10/2019 11:49
Has calmed my boy down alot
Tricia - 05/09/2019 16:17
Early days but seems to be working
Patrina - 21/08/2019 20:58
I have used Feedmark products, especially Steady Up and Magnesium, for my very anxious horse for several years.  The products are exellent and the frequent special offers are great.
Trusted Feefo Customer - 22/07/2019 08:43
We give this to a pony and a horse. Both mares are much calmer when it is used.
Karan - 19/06/2019 13:15
Love all the products I have purchased from feedmark x
Sue - 09/05/2019 18:23
Really helps to balance hormones and as an all round magnesium supplement
Abigail - 10/04/2019 13:32
Can notice a difference when my mare isn't on this product.
Sue - 27/03/2019 11:54
It works well for both the copper and magnesium defficiency on the land here and helps my mare with her hormones
Patrina - 21/02/2019 21:19
excellent product, I have used it for some time for my very anxious horse
Joanne - 11/01/2019 21:11
Works wonders on our horse - was close to selling him until someone recommended trying magnesium as the ground in our area was prone to deficiency (news to me at the time!')
Peter - 31/10/2018 19:31
- 28/10/2018 13:33
I have used this balancer for the last 12 months for my 20 year old made to help her maintain her weight and condition in hard work
- 03/06/2018 16:52
good profuct and good value.
Trusted Feefo Customer - 23/04/2018 11:31
Love the basic range no extras great value
Chris - 07/02/2018 21:10
I forgot how good it was until I stopped feeding it. Use it all year round
Trusted Feefo Customer - 06/02/2018 11:35
Tried many calmers and this actually seems to be working in just a few days!
Patrina - 20/10/2017 08:39
good product, at a good price
Joanna - 09/10/2017 12:54
Helps to keep my horse calm and reduced his fat pads.

Nutrition Information

Magnesium plays an important part in nerve and muscle function and can be helpful in calming horses and ponies.  Used daily, Magnesium can help to reduce difficult behaviour and produce a more relaxed approach to work.  Magnesium can also assist in attaining normal fat coverage in overweight equines, especially those with a cresty neck/fatty pockets.  Each daily serving provides 6g of bioavailable Magnesium oxide per scoop. 


Magnesium oxide (100%)


Crude protein 0.3%, Crude oils & fats <0.5%, Crude fibre 6.2%, Crude ash 97.0%, Sodium <0.01%

Feeding Guide

Weight of Horse/Pony Amount per day                               
Up to 400kg ½ scoop
Over 400kg 1 scoop
1 level (5ml) scoop of Magnesium weighs approximately 7g

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

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