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Thrush in Horses - Causes, Symptoms and Treatment

good stable management can prevent thrush in horses
Keep feet clean to prevent
thrush

Equine Thrush is a bacterial or fungal infection of the horse's frog and heel bulbs of the horse's foot.

Thrush affects the central and lateral clefts of the frog and the bulbs of the heel and is characterised by the presence of dead, black, foul smelling material in the affected areas.

The infection may penetrate the horny and sensitive structures of the horse or pony's foot.

An infection of thrush can be painful and cause your horse to go lame.

This unpleasant condition of a horse's hoof can be prevented and treated by good stable management and good hoof care from your farrier.

CAUSES OF THRUSH IN A HORSE'S FOOT

The main causes of thrush are:

  • Unhygienic conditions - eg horses standing for long periods on soiled bedding.
  • Feet not kept clean.
  • Lack of frog pressure resulting in poor blood circulation and limited horn production
  • Feet becoming too soft - allowing foreign bodies to penetrate the foot
  • Neglect by the farrier - poor shoeing or trimming
  • Poor foot conformation

Many organisms are involved, but the bacterial microbe Spherophorus Necrophorus is the most important as the bacteria thrive in conditions deprived of fresh air.

SIGNS AND SYMPTOMS OF THRUSH

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The most obvious sign of thrush is a foul smell which is noticeable when you pick out your horse's feet.

There is also an increased amount of moisture and a black discharge in the clefts of the frog.

If a horse has thrush the clefts of the foot tend to become deeper than normal and may even extend to to the sensitive tissue - causing the horse to flinch as you pick out and clean his feet.

In some cases of thrush the horse will be lame

HOW TO TREAT EQUINE THRUSH

A horse or pony with Thrush needs to be treated by a routine of cleanliness so that the frog and hoof can heal and return to normal.

The frog should be pared by your farrier to remove any damaged tissue

The feet should be cleaned daily and the clefts of the foot packed with medication. There are several things that can used including : iodine, peroxide (which should be diluted), eucalyptus oil, copper sulphate and commercially developed solutions.

Honey has has proved successful in treating thrush - it has natural antibiotic properties and doesn't sting the horse - and is easy to apply from a "squeezy" bottle.

SHOEING A HORSE THAT HAS THRUSH

In shoeing a horse with thrush the emphasis is to produce frog pressure by lowering the heels - but not at the expense of too much strain being applied to the flexor tendons

Where there is persistentlameness a bar shoe is recommended to give protection to the hoof and heel of the horse.

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 Thrush in Horses - Causes, Symptoms and Treatment

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