LAMINITIS EXPLAINED by Robert Eustace, FRCVS,  Director of the Laminitis Clinic at Dauntsey, and Founder of The Laminitis Trust

Most people associate laminitis with fat little ponies who have gorged on lush Spring grass, but laminitis is a serious and painful condition which can affect any breed, type, or value of horse or pony. The symptoms vary from a mild lameness in one foot to the animal lying sweating and groaning – sometimes giving rise to the misdiagnosis of colic.  But all laminitis cases have abnormally strong digital pulses and will characteristically stand on the back of the heel to take the weight off their painful toes.

Prevention is better than cure.   Spring is the danger period when fresh new grass contains very high concentrations of carbohydrate.  All experts agree that soluble carbohydrate is the cause and it is the total weight of carbohydrate which a horse or pony eats which puts it at risk of developing laminitis.   But be aware that a new flush of grass following a prolonged dry spell through the summer also spells danger.  I have even more admissions to the Laminitis Clinic in September.

  However, over-feeding carbohydrate whatever its source, rich grass or cereal-based compound feeds, is dangerous.  The pain caused by laminitis is dire and a severe attack can lead to the more serious condition of Acute Founder.  The most severe form of Founder is where the pedal bone becomes loose within the hoof.  This is described as a “Sinker” – and the majority of cases die without rapid and expert treatment. 

But 80% of cases could be avoided by careful management and feeding.  Feed according to work and seek out the lower energy high fibre feeds now available which carry the Laminitis Trust Approval Mark.  Dengie, Spillers and Dodson & Horrell manufacture suitable feeds.

Ensure your pony is in the correct bodily condition before you start to turn out in the Spring as you can’t diet an animal at grass.  You should be able to feel his ribs easily when you run your hand along his side.  He shouldn’t have fat deposits, particularly along his crest. Don’t overfeed – especially to achieve so-called “show ring condition”.

You can restrict grass intake of those at high risk by dividing grazing into smaller ‘weight-watchers’ paddocks.  However, collect droppings daily to avoid the animal ingesting large worm burdens, which could lead to severe illness or even death.  Also, consider the use of a muzzle with a slot cut in the bottom, enabling him to graze while restricting consumption (check muzzle daily). Greenguard make a muzzle suitable for horses, though I think it is too large to be reliable on small ponies.

Laminitis attracts more old wives tales than most equestrian subjects.  Ignore them and follow this simple advice:-

Treat all cases as an emergency.  Call your vet.  Correct treatment in the first hours will dramatically reduce the likelihood of it developing into the more serious conditions Founder or Sinking.

The animal is in severe pain.  Move him to a stable with a deep bed of shavings.   If he is a distance from his stable, consider transporting him rather than cause further pain by walking. 

Do not starve.  Offer a low calorie fibre diet with soaked sugar beet pulp, limited hay and Farrier’s Formula supplement.  The reason I recommend Farrier’s Formula is because it contains the three nutrients known to help the liver in deactivating toxins. -  liver dysfunction commonly coincides with laminitis.

Your vet will prescribe pain killers, usually ‘Bute’, and acepromazine (ACP), a peripheral vasodilator which will help improve the blood supply to the laminae.  ACP also acts as a mild tranquilliser and will encourage the pony to lay down and take the weight off his painful feet.  The vet may want to X-ray the feet to ascertain the damage already done.  X-Rays taken at the onset are useful for comparisons later, provided a repeatable technique is used.  He may fit frog supports to take the strain off the laminar structure.  Don’t fit anything which makes him take weight on his soles.  He should have complete box rest and shouldn’t be walked for 30 days after he is sound without the use of painkilling drugs.

The Laminitis Clinic Helpline:

We provide veterinary advice, a rapid radiological reporting service and a referral service.  Your vet can call us on 0870-444-0676.  Comprehensive information on the disease is also available on the website at www.equilife.co.uk/laminitis-org.

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Information supplied by Liz Higgins, Direct Tel: 020 8933 8383