What is EMS?

Equine Metabolic Syndrome (EMS) is a metabolic problem characterised by obesity or regional adiposity.

Obese Horse

EMS symptoms include:

  • fat pads and/or a cresty neck
  • insulin resistance (high circulating levels of insulin in the blood)
  • repeated incidents of laminitis

What Causes EMS?

  • As a ‘syndrome’ there is no direct cause, but instead a number of factors that contribute to the disease
  • Horses in their natural environment have a seasonal cycle of weight gain over the summer and weight loss over the winter. In the domestic environment, food is always available and this, combined with greater thermal protection and restricted exercise, means that some individuals are very prone to gaining weight and developing insulin resistance (IR)
  • Fat produces adipokine hormones and cytokines which are inflammatory mediators that decrease sensitivity to insulin and result in constant, low grade inflammation

Nutritional Management

  • As obesity worsens IR, the primary aim is to encourage weight loss and maintain the horse at an ideal bodyweight
  • Grazing should initially be eliminated until bodyweight is normal and recurrent laminitis under control
  • Total feed and forage intake should initially be restricted to 1.5% of the horse’s bodyweight on a dry matter basis, but dropped to 1.25% of bodyweight if the horse is resistant to weight loss
  • Ideally, supplementary feed and forage should supply less than 12% NSC dry matter – this is the sum of the water soluble carbohydrate and starch added together
  • Although soaking hay encourages loss of water soluble carbohydrate, it should not be relied upon to make high NSC hay ‘safe’ because results are highly variable
  • Providing a balanced diet with respect to vitamins and minerals is especially important, as EMS horses are in an inflammatory state and many vitamin and minerals are important antioxidants
  • Longer term grazing may be allowed, but should be restricted by area or with use of a grazing muzzle to manage NSC intake and bodyweight
  • If sound, exercise regularly as this should help to improve insulin sensitivity

Feeds suitable for horses with EMS

Hi-Fi Molasses Free
Hi-Fi Lite
Healthy Hooves
Healthy Hooves Molasses Free

Good Doer Ulcer Feeds

Dengie’s ‘Healthy’ range of fibre feeds are nutritionally balanced fibre products and as such, when fed at the full recommended quantity, no additional supplementation is required.

Dengie Vits & Mins and balancers are suitable for laminitis-prone horses and ponies and can be used to balance the ration.

For further information or friendly feeding advice, email the Dengie nutrition team or chat live with a nutritionist online.

Case study – Jake

Emma Williams got in touch to arrange a diet clinic after her horse, Jake, was diagnosed with EMS. “I keep him on a cattle farm” explained Emma, “where the grazing is fantastic but not ideal for a 15hh Connemara who’s a good-doer! He gradually piled on the pounds and before I knew it he was very round!”

Recommend Diet

Feed – 2kg of Healthy Hooves Molasses Free, split over two feeds a day
Forage – 3kg of soaked hay
Grazing – restricted by wearing a grazing muzzle

“I can’t believe the difference in him” says Emma on Jake’s transformation. “He’s lost over 99kg which is incredible! It’s been hard work, I have to continually monitor his diet and management but I’ve stuck with it – he looks and feels fantastic! I attended some local shows last summer where I showed off his new figure and was delighted to be winning rosettes!”

To read Jake’s story in full click here