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Chastetree Berry

To support normal hormone levels and responses

25 reviews. 4.8 / 5
Judith - 15/08/2022 09:40
My mare has been much more settled.
Debra - 31/01/2022 11:24
Have used this product before to help my 43 year old pony with his cushings. Along with the conventional veterinary treatment. I believe it helps keep it under control.. it comes in a fine palpable powder which he is happy to eat in his wet feed.
Alyson - 18/11/2021 10:57
Not certain if this is helping but worth a try as she is very mareish at moments
Trusted Feefo Customer - 30/09/2021 16:41
just received so will be able to answer in a few weeks.but was recommended by a friend whose horse is off normal medication now and just has the chastetree berry supplement
Hilary - 19/08/2021 08:12
Works great on my Welsh cob
Trusted Feefo Customer - 12/08/2021 19:44
Caught Cushings early and this supplement is amazing and we have a normal reading again.
Trusted Feefo Customer - 19/04/2021 08:03
Have used this on my mare for two months and its doing its job
Hilary - 22/02/2021 11:14
I haven't been using it for too long but so far so good, would prefer to review after a few more weeks
Morag - 15/01/2021 09:39
Have an older mare showing signs of cushings and this product has helped her no end.
Hilary - 27/10/2020 10:05
Good product, but not been using it long enough to fully asses effect.
Trusted Feefo Customer - 11/06/2020 17:44
Seems a really good product, always use feedmark although a fair bit more expensive than others (hence the drop in 1 star!)
Frances - 18/05/2020 15:09
The mare is eating this happily in her mash and seems much happier and softer through the back now that her hormones seem to be calming down!
Hannah - 18/03/2020 19:41
My fussy mare doesn't like the taste but if I add garlic she seems to eat it!
Trusted Feefo Customer - 04/03/2020 22:00
Excellent so far, I would buy again
Trusted Feefo Customer - 22/12/2019 13:14
I have an elderly mare who has problems when she comes into season. This produce appears to help her. I will definitely continue to use.
Trusted Feefo Customer - 10/07/2019 18:02
It appears to help my mare. Will continue to order.
Trusted Feefo Customer - 29/05/2019 15:12
Excellent product, has worked well on my mare
Trusted Feefo Customer - 10/01/2019 09:14
Karan - 23/04/2018 15:22
Joanna - 15/12/2017 16:41
Chastetree berry keeps my 26 year old Cushings pony in top top health without having to use expensive medication. Thank you feedmark
Lyn - 25/10/2017 13:33
Not sure yet how well it is working but the supplement is really fine and easily 'hidden' in a very small feed.
Sonya - 25/10/2017 11:49
Made my mares cycles much easier
Trusted Feefo Customer - 09/10/2017 19:43
My very old pony has Cushing's, chastetree Berry keeps her hormones on an even level so she doesn't need to have medication, fantastic
Clare - 09/10/2017 12:29
Top quality product as always
Trusted Feefo Customer - 09/10/2017 11:30
Works as stated on the product

Nutrition Information

Chastetree Berry (Agnus-Castus) is also known as Monk’s Pepper and was first recorded as being used by Hippocrates in the 4th century AD.  Chastetree Berries have long been fed to horses and ponies to support hormonal challenges, and to older horses that require pituitary support.

Unsuitable for pregnant mares


Chastetree Berry powder (Agnus castus), Calcium carbonate (for product consistency)


Crude protein 2.2%
Crude oils & fats 1.5%
Crude fibre 24.9%
Crude ash 51.8%
Sodium <0.1%

Feeding Guide

Weight of Horse/Pony Amount per day                                  
Up to 400kg ⅓ scoop
Over 400kg ¾ scoop


1 level (50ml) scoop of Chastetree Berry weighs approximately 27g

Unsuitable for pregnant mares due to the hormonal action of this herb.
If wanting to feed to pregnant or lactating mares seek veterinary advice prior to adding to the diet.

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

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