✅10% OFF over €250! ✅REWARD POINTS ✅45 YEARS OF RESEARCH ✅10% OFF over €250! ✅REWARD POINTS ✅45 YEARS OF RESEARCH

Chastetree Berry

To support normal hormone levels and responses

31 reviews. 4.7 / 5

60 Days Supply (1.20kg) - €30.99

- Pouch
- Refill Bag

- +

Chastetree Berry

To support normal hormone levels and responses

Chastetree berry is a powerful ingredient to support horses with hormonal challenges. The ideal herb for older, curly-coated horses needing pituitary support. Chastetree berry also supports settled and good behaviour in mares and 'riggy' geldings.

Unsuitable for pregnant mares due to the hormonal action of this herb.

31 reviews. 4.7 / 5

Reviews
Technical
FAQ's

Lisa - 30/10/2026 18:32

There was no change in her eating habits so that taste must have been good. She has steadied out and calmed down and is less moody!

Claire - 22/10/2026 19:39

Been using chaste tree berry for quite some time now to help support my horses well being due to being borderline for cushings.

Susan - 31/08/2026 20:06

Only been using for a few weeks but her coat is definitely not so curly as normal even though her winter coat has started to come through.
I split the dose between 2 feeds and she doesn’t seem to mind the taste.
Shall definitely keep using & hopefully next summer when it comes to losing winter coat she will lose a lot easier than this year.
She has Cushing disease but I am reluctant to try vet medication due to side effects, so I’m really hoping that chaste berry is beneficial to her in many ways.
Good quality product as always from Feedmark.

Anne - 31/08/2026 19:57

Great company. Grest product
Definitely help my mare's seasons
Brilliant customer service
Thank you

Victoria - 13/10/2025 19:52

This supplement has settled my 9 year old mare down. Changing fields and next to new horses she was very excitable, but since starting the Chastetree Berry she has returned to her normal self.

Linda - 24/08/2025 22:23

My elderly mare was diagnosed with Cushing a few years ago and prescribed Prascend by my vet. After taking the medication for a while, she went off her feed and looked very unhappy. A friend recommended Chastreeberry, so I gave it a go, and took her off the prescribed medication My mare has had a new lease of life, she has shed her coat really well this year and just seems a whole lot happier with life.
I’ve discussed this with my vet who has agreed she’s a happier horse but there is a risk to her immune system if she’s not on the prescribed medication. I’ll take the risk, depressed horse or happy horse?

Anne - 31/07/2025 06:20

This has completely settled my mare. She had separation issues when in season. This has gone
She is much quieter to handle
She is a fussy eater however no issues with this product
I would thoroughly recommend

Vikki - 21/07/2025 19:42

Brilliant stuff would highly recommend

Jodie - 07/06/2025 19:09

She refuses to eat it!

Margaret - 07/06/2025 09:03

My pony won’t entertain it tried mixing with all sorts she leaves her tea will have to keep trying .if it works it’s cheaper than the tablets

More reviews will load without leaving this page.

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.

Unsuitable for horses on medication for Cushings.

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..

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.

Composition

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

Analytical

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

I have a very hormonal mare, would this stop her coming into season?

Chastetree Berry won’t stop your mare coming into season, but it can help to maintain more stable hormone levels through oestrus, which will keep behaviour more settled. For the best support for hormonal mares we recommend that you look at Hormonease.

My gelding is riggy, and at times his behaviour is very stallion like, is this only used for mares, or can it help geldings too?

Chastetree Berry can help to maintain normal hormone responses, and can be fed to riggy geldings as well as hormonal mares. It is included as an ingredient in Feedmark Hormonease.

My pony struggles to shed his winter coat, I was told this supplement could help?

For older horses and ponies that may struggle with coat loss, this herb can help to maintain normal shedding patterns. If you have a horse or pony that has been diagnosed with Cushing's you may be interested in C-Plus™.