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The Call of the High Country

"There was movement on the station for the word had got around that Nickala and Genevieve were on their way out of town...."

Vets Genevieve and Nickala recently took time out from OVH for a well earned break with their trusty horses Stuart Little and Namo. They joined a small group on a 4 day ride through the majestic scenery of the Victorian High Country.

Intrepid through all weather - rain, snow, fording 31 rivers and lots of sunshine they had a wonderful experience. Nickala was very happy to return having had a near death experience when Namo stumbled and lost his footing traversing up a narrow path on a steep precipice - riding behind, Genevieve was worrying what she could possibly tell Nickala's parents!

We are all relieved they made it back safe and sound, refreshed and with a great appreciation of the history of this picturesque landscape.

Stuart and Namo are happy Genevieve and Nickala are back at work!

Contents of this newsletter

01  Sheep biosecurity 101

02  Managing your working bulls this breeding season

03  Accountable and audited pregnancy diagnosis

04  What are sarcoids?

05  Flexural Limb Deformities

06  Are ewe serious?

01 Sheep biosecurity 101
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With a large number of sheep being moved about the country-side, grazing what is left, it is important to take a few measures so you don’t bring unwanted bugs to your farm. Here are some pretty simple measures you can take when buying and bringing sheep to your farm:

Before you buy:

  1. Check the Sheep Health Statement. This is available at farmbiosecuirty.

  2. Check the health of the sheep while in the pen. Pick out 20 sheep, specifically looking for any which are lame or have pulled wool. Examine them for footrot and lice.

  3. If you are in the market for rams, be very wary of brucellosis. This disease is still very common in sheep flocks. It is best to steer clear of saleyards to buy rams, and instead buy from brucellosis free-accredited flocks.

On introduction to your farm:

  1. Drench them with a quarantine drench. The best two on the market are Zolvix® or Startect®

  2. Footbath them with 10% zinc sulphate. This will remove bacteria off their feet, but won't kill footrot if they are carrying it.

  3. A good plan is to assume they have lice. There are a several options you have here, and depending on a few variables, everyone will do this differently. The best guide for managing lice in introduced sheep is available on liceboss.

Once on farm:

  1. Quarantine –Keep sheep isolated until you are sure they don’t have lice or footrot. For footrot, it is difficult to tell until after a good period of warm wet weather. For lice, it’s ideally until they are next shorn.

  2. Sheep in quarantine can be moved through yards, just don’t let your main herd have access to the yards for 7 days after.
02 Managing your working bulls this breeding season
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When bulls are running with the herd, you can take several steps to increase bull activity and reduce health risks.

  • Ensure there are at least 2 sexually active fertility-tested bulls with the herd at all times.
  • Avoid using overly aggressive, dominant bulls.
  • Monitor bulls for lameness regularly. Remove, treat and rest lame bulls promptly. Replace them with healthy bulls.
  • Regularly observe bulls that are serving to ensure they are working correctly. Immediately remove bulls that are unable to serve properly and replace them with more capable bulls.

Manage heat stress risk

Heat stress can reduce bull performance. Try and run individual bulls with the herd for no longer than two days before resting during periods of high heat stress risk.

Further reduce heat stress risk by:

  • providing adequate shade and cool water

  • considering strategies such as:
    - using more bulls, and
    - providing bulls with extra or longer rest periods between work.

Republished with permission from the new and improved InCalf book.

03 Accountable and audited pregnancy diagnosis
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Reproductive management is a pivotal driver of a herds’ profitability. Knowing the pregnancy status is fundamental to having control over calving pattern, and facilitates strategic decisions within the herd.

We know there is a wide variability in the accuracy of pregnancy testing services. In many states of Australia, anyone can buy an ultrasound and become a ‘preg tester’. Given the importance of accuracy, it is imperative to find someone with a proven track record. This is why the Australian Cattle Vets developed PREgCHECK™ (Professional Reproductive Examinations). This scheme has taken over from the National Cattle Pregnancy Diagnosis scheme. This is the only pregnancy diagnosis scheme in Australia which assures that you are getting an accurate diagnosis, every time. Only accredited vets can perform a PREgCHECK™.

The PREgCHECK™ scheme is your guarantee of quality as it is:

  • Accountable

  • Audited

  • The only system that allows for use of the highly recognised PREgCHECK™ tail tags.

The best time to age foetuses to give you accurate calving dates is 5-14wks after the end of mating. Once your spring joining is over, please get in touch with us for your PREgCHECK™ requirements.

04 What are sarcoids?
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Sarcoids are the most common skin tumour affecting horses. They are a serious concern as they can be aggressive and locally invasive, although they do not spread or “metastasize” to internal organs. Sarcoids are often unpredictable, and treatment is not necessarily straightforward.

There are 6 different forms of sarcoids which are described based on their appearance. Sarcoids may vary from a flat, scaly/hairless area, to a nodular, ulcerated growth, and anywhere in between. They may occur anywhere on the body, although the head, belly and chest are frequently affected areas. Old skin injuries, particularly on the legs, are also common sites for sarcoids.

Diagnosis is usually made on examination and history of lesions. Biopsy is often definitive although the risk of traumatising and triggering expansion of the lesion should be considered.

There is no magic cure although a gamut of treatment options are available including: surgical removal, cryotherapy, immune therapy, radiation therapy, and/or topical treatments. Treatment choice will depend on the history, position and size of the sarcoid/s, as well as budget.

The risk of reoccurrence is high.

What can you do?

Inspect your horse closely and regularly to aid in identifying suspicious lesions early. Avoid purchasing a horse with suspicious lesions and always consult your vet if concerned.

05 Flexural Limb Deformities
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Whilst the majority of foals will be on the ground by now, late Spring and early Summer will continue to see some later arrivals. Flexural Limb Deformity, often referred to as “contracted tendons” is a common orthopaedic condition affecting foals whereby a joint or limb presents in an abnormal flexed position.

When the condition is present at or around birth it is referred to as “congenital”. The exact cause is not fully understood however factors such as foal positioning in the uterus, nutrition, genetics, and toxins have been considered.

Due to an inability to straighten the legs, severely affected newborn foals may be unable to stand and nurse. Mild cases may appear “forward” at the knees or fetlocks.

Mild cases will often respond well to exercise restriction (box rest) alone, although more severely affected foals may require splinting, corrective farriery, and/or IV medication (oxytetracycline). Even in mild cases the condition can be quite painful, and therefore pain relief medication is important.

To the other extreme, some foals may be born with tendon laxity. These foals may appear to walk on their heels, with the pasterns or fetlocks close to the ground. The problem usually self corrects although soft surfaces, bandaging of the pasterns/fetlocks, and corrective farriery can help prevent trauma to the lower limb.

06 Are ewe serious?

A team of researchers have successfully gown a preterm lamb within an artificial womb. The lamb was removed from the ewe at 115 days gestation, and grown out until term. It was healthy and normal on all accounts. Watch the video to be amazed!