NAF Five Star Oestress Calming Powder for Horses

NAF Five Star Oestress Calming Powder for Horses
500g Tub
1kg Tub
2.5kg Tub

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  • 500g Tub £24.99
  • 1kg Tub £44.99
  • 2.5kg Tub £101.50

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Description

Oestress Powder compliments the mare's natural oestrus cycle by encouraging regularity and providing extracts of herbal ingredients that have been used for hundreds of years to support hormone balance.

  • So by improving her diet with Oestress, you are helping your mare to help herself.
  • Oestress also provides bio-available magnesium to relax muscle tension and encourage calmness.

Oestress is rich in natural antioxidants to naturally support a healthy system. Oestress should be fed daily throughout the spring and summer season and may be increased in accordance with her oestrus cycle. However, if needed Oestress is suitable for year round use.

Composition

  • Chastetree berries, Cramp bark, Magnesium oxide, Black cohosh (root, ground), Withania, Carrot (dried), Sunflower seed, Cynanchum, Immortality herb, Calcium carbonate, Rosehip shells, Skullcap, Omicha berries, Mushroom (dried), Dried algae (Chlorella sp), Ginger root, Liquorice root, Turmeric, Rapeseed oil (refined), Cane molasses, Lignocellulose, Wheat feed, Glycerine, Maize cobs.
Analytical Constituents
Crude Ash 23.70%
Crude Protein 6.15%
Crude Fat 9.44%
Crude fibre 19.60%
Acid Insoluble Ash 4.73%
Sodium 0.06%

For use where behavioural changes and tension are seen in mares which can affect temperament and performance.

Introduce gradually for fussy feeders. Loading rate may be used initially and during peak times of her season.

Also suitable for colts and geldings showing ‘riggy’ or stallion like behaviour.

Not recommended for pregnant mares and discontinue use on brood mares two months prior to covering. Maintenance levels may be adjusted to suit the individual and are not necessarily related to bodyweight. Also suitable for colts and geldings showing ‘riggy’ or stallion like behaviour. Not recommended for pregnant mares and discontinue use on brood mares two months prior to covering.

Horses & Ponies g per day scoops per day
Loading rate (7-10 days) 30 3
Standard Maintenance 10-20 1-2

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Reviews (20)

Summary of Reviews for NAF Five Star Oestress Calming Powder for Horses

Overall 5
Effectiveness
Ease Of Use
Value For Money
Absence Of Side Effects
18 out of 20 (90%) customers would recommend this product.
5 stars (16 reviews)
4 stars (2 reviews)
3 stars (0 reviews)
2 stars (1 reviews)
1 stars (1 reviews)

Only verified purchasers of this product can leave a review.

Brilliant product
Verified Purchase

By Julie Heaton-Caffin on 29 September 2026

It's the only supplement that has consistently kept my mares hormonal behaviour in check

Customer recommends this product

Fantastic product
Verified Purchase

By Nicola Thompson on 26 September 2026

Only product that works for my TB mare highly recommend

Customer recommends this product

Oestress
Verified Purchase

By PENELOPE ADSHEAD on 2 September 2026

Fabulous as ever quick delivery received well packaged thankyou

Customer recommends this product

Made a big difference
Verified Purchase

By Ruth Norman on 7 July 2026

this has made a big difference to our mare - it doesn't remove all the behavior but it reduces it to a manageable level

Customer recommends this product

Wonder supplement
Verified Purchase

By Dawn O'Neill on 6 March 2026

Wow what can I say about Oestress, my tb mare is like a completely different horse. Kallie is back to being my happy girl again and everyone is commenting how different she is. Kallie is back to being her happy loving self again. My daughter is now enjoying riding her again rather than having a constant battle every ride. Kallie is happier in the stable and in the saddle. I would say if you are even considering trying Oestress do it cos the different it made for kallie is massive.

Customer recommends this product

1 person found this review helpful

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Q & A

Below are some recent questions we've received regarding NAF Five Star Oestress Calming Powder for Horses, including answers from our team.

21 April 2025 at 7:24pm

How long does 1 kg last

Natalie Phillips

  • VioVet customer since 2025
  • From: Devon, United Kingdom

Hi. How long does 1kg tub last please

  • VioVet Staff

| Maintenance Feeding Rate (average size animal)
If fed at 10g per day - 500g = 50 days 1kg = 100 days 2.5kg = 250 days | 10-20g
|

10 March 2025 at 7:28pm

Can I use oestress with other supplements?

Barbara Young (b.j.young140)

  • VioVet customer since 2016
  • From: Northumberland, United Kingdom

Can it be used in conjunction with another calmer supplement? At present my mare is on Calmer Equine Plus which contains pre and pro biotics, magnesium and B vitamins.

  • VioVet Staff

In general, combining a hormonal-balancing supplement with a calmer and digestive support supplement is fine, as long as you're mindful of the overall nutritional load and your mare's individual health needs.

27 May 2023 at 10:03am

Season pain

Esther Birrell

My mare appears really uncomfortable biting her sides and kicking out does this supplement have a pain relief effect?

  • VioVet Staff

This provides bio-available magnesium to relax muscle tension and encourage calmness, but not necessarily pain relief.

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