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Winter series: Impactions

Colic is a collection of clinical signs shown by a horse indicating abdominal discomfort. We see an increase in colic’s due to impactions during the winter months.

Impactions of the gastro intestinal tract commonly occur at the pelvic flexure. The pelvic flexure is a part of the large colon which turns 180 degrees on itself and naturally narrows. The reduced speed of food material passing through this area mean it is more susceptible than other areas to blockage.

Other than anatomy there are a number of changes that occur, mostly in the winter, which increase the risk of blockage:

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  • We reduce the amount of hours that horses and ponies are outside eating short moist grass and replace it with eating longer, drier roughage such as hay and haylage. Larger amounts of hay and haylage can be eaten alot quicker.
  • Horses and ponies often have less exercise either because they are confined to a stable for longer periods of the day or because we can’t ride them as much due to shorter daylight hours.
  • Horses may reduce their winter intake due to the water being cold or frozen, causing the food material to become dehydrated in the gut.
  • Horses may be turned out on sand paddocks to stretch their legs. If roughage is fed from the floor then they will ingest sand particles which will rest in the gut.
  • Horses and ponies may eat large amounts of straw from their bedding.

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As food material slows down in the pelvic flexure more water is reabsorbed from the gut causing drying of the gut contents, reducing motility of the gut further, leading to more drying and eventual blockage. Usually the horse will have passed reduced amount of, drier than normal, faeces over the preceeding 48-72 hours to eventually passing no droppings at all.

Pain from impaction colics is due to stretch of the gut.  Impaction colics usually are mild in pain but can have periodic episodes of more intense pain. Normal colic signs such as pawing, flank watching and inappetance can be exhibited.

Examination by a vet may reveal a mildly increased heart rate, dry gums and prolonged skin tent. Gut sounds can sometimes be reduced due to slowing of the gut, however they can also be increased as the body’s response to try to shift the blockage. Impactions of the pelvic flexure can usually be identified on rectal examination. They usually are doughy in consistency and sit in the lower left area of the abdomen.

Treatment, as with any colic, involves providing pain relief and a muscle relaxant. In addition the blocked food material needs to be rehydrated. This is most commonly done using a tube passed down the nostril of the horse into the stomach. A mix of water and electrolytes is then administered. Over time this will seep through the food and hopefully relieve the blockage. Food is restricted until poo is seen as it will contribute to the blockage. Tubing may have to occur repeatedly over several days. In severe cases intra venous fluids may need to be used.

So to prevent your horse or pony from becoming impacted this winter try to:

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  • Change diet slowly.
  • Avoid straw bedding if you are concerned your horse or pony eats it.
  • Try to keep exercise maintained, a walk around the yard is better than standing still in a stable.
  • Ensure a ready access to fresh water.

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It is worth noting that there are other causes of impactions such as ileo-caecal impactions due to tapeworms and ascarid impaction of the small intestine in youngsters and these will be discussed at a later date.

 

As always, if you are concerned about colic in your horse, please call us on 01772 861300

 

Winter Series: Mud Fever

Mud fever, also known as greasy heel syndrome but correctly termed pastern dermatitis, is an infection of the skin usually of the pastern.

The bacteria causing the infection can be from the environment or living on the skin itself and will gain entry due to an injury to the skin surface. It more commonly affects white socked legs, as the skin’s immune function of these areas is reduced. In minor cases it may present as just a few scabs, however, it can spread above the fetlock, occur concurrently with cellulitis, or leg filling, and be openly bleeding.

Although it can have a typical appearance sometimes a vet visit is needed to rule out other conditions and to identify predisposing factors.

The skins integrity is weakened by continuous wetting of the skin and rubbing from mud meaning it is a problem commonly seen in Winter. However, it may not just be wet and muddy conditions that are causing the problem……..

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  • Lymphoedema: this is typical of cob type or draught breeds. Lymph fluid circulates around the body carrying nutrients in lymph vessels. The lymph vessels in these types seem to be less effective in circulating blood in the lower limbs which leads to accumulation of fluid and skin thickening.
  • Leucocytoclastic vasculitis: this is an immune mediated condition whereby blood vessels become damaged. Personal experience shows it occurs more commonly on the outside of white pasterns.
  • Photosensitisation: this is caused by either liver disease or allergic reaction meaning the horse doesn’t deal with chemicals that react with light meaning that when the horse is exposed to UV radiation (sunlight) it becomes sunburnt.
  • Feather mites/ Chorioptic mange: Chorioptes mites causes itchiness of the lower limbs. This can lead to self trauma and wounds allowing skin infection.

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To rule out these conditions it may be necessary to take blood samples or biopsies to determine if one of these are involved.

In order to treat Mud Fever you may need to treat the underlying cause. Sometimes a thorough antibacterial cleaning and removal of scabs is needed, under sedation, so that topical antibacterial, steroidal and protectant creams can be applied directly onto the damaged skin. In some cases when associated with cellulitis or more widespread infection of the leg systemic antibiotics may be needed.

The deliberation is always; do you wash the mud off your horses legs or do you brush it off when dry ?? In our opinion neither is superior. If you are to wash your horses legs they need to be thoroughly dried and if there is already some mud fever present avoid wetting the leg further.

If you are concerned about Mud Fever in your horse, please call us on 01772 861300

No EYE in team

Rags’ owner had noticed that his right eye looked a little swollen and weepy and over the course of the day it also became cloudy. With concern, his owner called Oakhill Equine Vet, Stuart Davies, to get Rags thoroughly checked.

Rags’ right eye was partially closed (blepahrospasm) and his right pupil was very small – this is a response, by the horses eye, to discomfort or pain (uveitis).

 

 

 

 

 

 

 

With careful examination using an ophthalmoscope, a very small (only approx 1mm) black object could be seen penetrating the cornea (outer surface of the eye) in the lower left corner of the eye.

Rags was given pain relief, atropine (to dilate the pupil which in itself provides pain relief), then his owner bought him into the Oakhill clinic.

Understandably horses needed to be very cooperative when dealing with their eyes, so Rags was given some sedation and a local anaesthetic block allowing his eye lid to be held open.
Fellow Equine Vet, Jess Wray, then carefully removed the black object that turned out to be a thorn!! Great team work!

 

 

 

 

 

 

 

 

 

Rags was able to continue his pain relief and antibiotic drops at home. A week later you can see his eye is completely back to normal and from now on he will be tuned out with a face mask!

This case demonstrates the importance of careful eye examination. If you notice anything different about your horses eyes, please contact us. 

Dangers of over-rugging

Horses like humans have a temperature range with which they don’t have to expend energy to lose or gain body heat. This range is 5-25 degrees celsius. Horses have adapted to maintain their body temperature within this range and specifically when temperatures are below 5 degrees, these adaptations include:

 

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  • A thicker and longer winter coat.
  • Natural coat oils which repel water from the outer layers of the coat meaning the layers close to the body are dry and warm.
  • The digestive system generates heat as roughage is broken down.
  • Blood is diverted from extremities to preserve the temperature of central organs (hence sometimes horses have cold ears).
  • Muscles can erect hairs to trap air and provide insulation.
  • Gaining fat in the summer to provide winter insulation.

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When we feel cold horses might not due to the adaptations mentioned above. In addition, temperatures in the morning or evening (when we usually see to our horses and decide on their daily costume), are currently 7 degrees different to the midday temperature.

It is thought that the natural change in weight of a horse/pony in winter and summer allows for a resetting of hormone levels. They utilise fat reserves built up during the summer to maintain their body heat during the Winter. When horses do not follow this pattern, they are thought to then become more at risk of laminitis the following year and we are certainly seeing an increase in horses and ponies diagnosed with metabolic disorders such as EMS.

 

Over-rugging can not only lead to difficulty in managing the weight of your horse or pony with risks of metabolic disorders and laminitis but can also lead to the horse overheating. When horses over heat they divert blood to the skin surface so that they can lose body heat by sweating. A moist and warm environment can increase the risk of bacterial skin infections, rug rubs and can also lead to colic.

We can’t ignore that rugs are needed by elderly horses that are underweight and don’t have those body reserves to burn, finer horses and to an extent horses that are stabled, that aren’t creating as much body heat from moving. However, the decision to rug your horse should be made based on the body condition of the horse or pony in question. If your horse or pony is overweight then clipping and rugging in a lightweight to keep it water proof could be the aid to weight control. Also considering the daily temperature range would alleviate your horse over-heating in the middle of the day.

 

Temperature Stabled/Clipped Stabled/Unclipped Turned out/Unclipped Turned out/Clipped
15 degrees and warmer Zero fill Nothing Nothing Nothing
10-15 degrees Light weight (100g) or zero fill Nothing or zero fill Nothing Nothing or light weight (100g) or zero fill if wet and windy
5-10 degrees Medium weight (250g) Light weight (150g) Nothing or light weight (100g) Light weight (150g) plus neck cover
Zero to 4 degrees Heavy weight (300g) Medium weight (200g) Nothing or light/medium weight (150-250g) Medium weight (200g) with neck cover
-10 to zero degrees Heavy weight (300-400g) with neck cover Medium weight (200-300g) with linear Light or medium weight (150-300g) with neck cover Heavy weight (300-400g) with neck cover plus liner
-10 degrees or colder Heavy weight (300-500g) with neck cover plus liner Medium or heavy weight (300-400g) with neck cover Heavy weight (300-500g) plus neck cover Heavy weight (300-500g) plus liner and/or under blanket and hood.

 

Image source: Blue Cross

 

Filly runs into arena wall

*Warning – contains graphic images of injury*

A few weeks ago, Equine Vet, Hattie Barnes was called out to a 3 month old filly that had unfortunately run into an arena wall.

As you can see from the photograph, the wound was very large but thankfully superficial.
Hattie sutured the wounded and placed a drain to help remove fluid from the large dead space between skin and bone.

Wound after filly ran into wall

Wound prior to treatment

Sutured wound with drain

Wound after stitches removed

 

 

 

 

 

 

 

 

 

 

Thankfully recovery was quick and the patient is back to normal foal life now!

Equine Summer Social

Thursday 13th September 2018

7.00pm start
at Oakhill Veterinary Centre, Langley Lane, Goosnargh, PR3 2JQ

To book your place contact 01772 861300 or equine@oakhill-vets.com

Join the Oakhill Equine Team for an evening of fun, hospitality and education.

  • ‘Pre-Purchase Examination’ talk and demonstration
  • Tour of the Oakhill Equine Clinic, including our MRI system and surgical facilities
  • Dental demonstrations
  • Fun & Games

BBQ & DRINKS
FREE EVENT
To book your place contact 01772 861300 or equine@oakhill-vets.com

Tapeworm testing

The EquiSal Tapeworm Test works like a blood test but, instead, uses saliva that you collect yourself. The test is scientifically proven to diagnose tapeworm burdens with high accuracy – it tells you if your horse has a burden and whether you need to worm or not.

To test for tapeworm, all you need to do is collect saliva from your horse using a specially designed swab and return to the practice.

Tapeworm testing now forms part of our Annual Worming Programme, reducing the need for wormers, the use of which contributes to wormer resistance.

www.oakhill-vets.com/annual-worming-programme/

Eye problems in horses

We are seeing an exceptionally large increase in the number of horses with eye problems. These problems are including eye ulcers, uveitis, trauma to the eye and conjunctivitis.

 

Causes

  • Some of these problems are related to flies, causing infection.
  • The bright sunlight that we are currently getting is causing the sensitive areas of the eye to become inflamed and painful in some horses
  • In many areas there is now little grass on some fields due to the lack of rain and therefore some horses are rooting in hedges, where they wouldn’t normally be and scratching their corneas

What to look for:

  • Discharge from eyes (can be watery or cheese like)
  • Red eyes or conjunctiva
  • Closed or partially closed eyes
  • Excessive blinking with the affected eye
  • Sensitive to bright light
  • Swollen eye lids
Uveitis

Photo of a horse with uveitis – Note the pupil which is shut due to the inflammation in the eye

Horse Eye Ulcer

Photo of a horse with an eye ulcer. The green area is where the ulcer has been stained by a vet

 

 

 

 

 

 

 

 

 

 

 

 


How to help your horse

  • Turning your horse out in a full fly mask with UV protection is the best way to avoid eye problems.
  • Where possible, avoid turning your horse out in the bright sunlight, unless it has a mask on.
  • Avoid riding at the brightest, hottest part of the day
  • Observe your horse’s eyes daily

** IT IS VITAL THAT IF YOU NOTICE ANY OF THE ABOVE SIGNS, THAT YOU CALL A VET WITHIN 24-48 HOURS. EYE PROBLEMS CAN DETERIORATE RAPIDLY AND CAN LEAD TO YOUR HORSE REQUIRING AN EYE TO BE REMOVED IN EXTREME CIRCUMSTANCES. HOWEVER, MOST EYES ARE SUCCESSFULLY TREATED IF PROMPT VETERINARY ATTENTION IS SOUGHT. **

Heat Stroke in Horses

Hot temperatures and high humidity can lead to heat stroke in horses.

Heat stroke is a condition that occurs when a horse is unable to lose body heat and its body temperature increases rapidly, which can lead to the respiratory, vascular, nervous and muscular systems to stop working as normal. Therefore, heat stroke must be treated promptly and properly.

Symptoms

Heat stroke may start as dehydration or heat exhaustion, with heat stroke rapidly following:

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  • Restlessness/Lethargy
  • Rapid pulse and breathing which may progress to a weak pulse
  • Heavy breathing
  • Increased sweating
  • Excessive salivation
  • Redness of the tongue and oral area
  • High body temperature
  • Erratic heart beat
  • Muscle spasms
  • Stumbling gait
  • Collapse

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Prevention

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  • Taking caution not to expose the horse to hot and humid conditions.
  • Ride in the morning or late evening, avoiding the hottest time of the day.
  • Provide plenty of water.
  • Provide shade/shelter.
  • Avoid travelling the horse in the heat, unless there is adequate ventilation.
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Causes

Exposure to a very hot or humid environment, combined with inadequate ventilation, can lead to heat stroke. Other common causes include:

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  • High level of physical stress
  • Excessive exercising
  • Increased weight (obesity)
  • Respiratory diseases

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Treatment

Time is of the essence when it comes to treating heat exhaustion.

If you suspect your horse is suffering from heat stroke, you must cool it down and ring your vet immediately who will advise you on what to do until they arrive.

Cold water should be applied to the skin, usually poured over the horse’s body. Also, fanning the horse and guiding it to a shady area will assist in cooling the animal.

Heat stroke indicates a severe loss of electrolytes, so intravenous electrolyte administration is often recommended as part of the treatment process for heat exhaustion.

 

£10 OFF EQUITOP MYOPLAST OFFER IS BACK

During June 2018, you can claim £10 OFF a 1.5kg tub of Equitop Myoplast.

Simply click here to download your voucher and present it at the Oakhill practice when purchasing a 1 x 1.5kg tub of Equitop Myoplast between 1st – 30th June 2018.

Equitop Myoplast® is a unique and natural supplement for horses, packed with 18 key amino acids including 9 essential amino acids. The blend of amino acids in Equitop Myoplast provides the building blocks for efficient lean muscle growth without horses becoming ‘fizzy’ or bulking up on fats and oils.

Terms and conditions on voucher