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November has been a busy month at HVC, with us sadly farewelling Emma who is off to the beautiful Southern Highlands. We are also saying goodbye to another friendly face on the 12th December, with Bec and her partner Anthony are leaving us and heading off to Coolac. There is no doubt these 2 ladies will be missed and we wish them all the best for the future.  On a brighter note we welcomed locum vet Candice, who has done an exceptional job in filling the void Emma has left behind in the clinic. 
As the spring breeding season heats up it has seen November the month of Embryo Transfer in horses. Reon is also in his busiest cattle E.T month. We finished our cattle A.I in the last week, and have also been running some unofficial trials on heifer mob.
Shane and Seumas spent 3 days at a beef cattle, and sheep production conference in Wagga. Whilst in attendance they mingled with professors, asked a-lot of questions and are now hoping some of this will benefit local farmers. 
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INSIDE this NOVEMBER 

- Check out our website 
www.holbrookvetcentre.com.au 

- Photo of the Month 

- Staff Profile:
Seumas Mckillop

- Vet Article's: 
Bull Testing

Pink Eye 

Article - Bull Testing 


How well are your bulls working?

We are now 4 weeks into most of our joinings in this district. By this stage we would have approx. 70-75% of our cattle pregnant and as such the workload on the bulls will be reducing. 

It would be the ideal time to have a good look at the bulls and remove any bulls that may be working at a sub-optimal level. This will include issues such as lameness, penile infections or trauma and preputial injuries. It would also be a good point in time to rotate bulls throughout the mobs. 


What we must remember is that in the commercial herd the most important outcome of a joining is that we have the highest number of females pregnant in the shortest period of time possible, early on in the joining period. The best way to achieve this is to try and have a set up whereby every breeding female is exposed to as many fit working bulls as possible every day of the joining from as early on in the joining period as possible.

The most effective strategy to try and achieve this is to;

-Ensure bulls have been service ability tested prior to joining.

-Multi-sire join all mobs.

-Rotate bulls throughout joining, now being an appropriate time.

-Closely monitor bulls during joining and remove or add bulls from mobs as appropriate.
 

So, where possible ensure that cows have been exposed to as many fit bulls as possible, remember that the optimal target is 65% pregnant in the first 3 weeks and that pregnancy testing can start from 6-8 weeks after the bulls are removed. In herds that are using AI programs, the ideal program is to pregnancy test at 85 days from the initial AI, which will have 1st and 2nd round cover bull pregnancies being picked up at 65 & 45 days, respectively.

Article - Pink Eye 


How to deal with all these eyes…

The pink eye season is now in full throw and we are assisting many producers with preventative and treatment protocols to deal with this common and destructive disease. With people starting to think about weaning programs towards the end of summer it is an important time to remember a few key 
points regarding the control of pink eye. 

As we have stressed in the past, there are 3 important factors in the development of pink eye:

Animal immunity – young, stressed animals are far more susceptible.

Damage to the eye – many pink eyes start as a corneal (surface layer of eyeball) ulcer which then allows the introduction of bacteria, this is most commonly as a result of a grass seeds from pasture or hay, grazing stubbles/ rank pastures, dust, etc. All of these factors are more likely during activities such as weaning.

Spread of bacterial agent – a highly contagious bacteria, most commonly spread by flies.

Pink eye is caused by a number of bacterial agents, the most common however is Moraxella bovis. This bacteria can cause primary pink eye in the absence of trauma, although it is more common for pink eyes to start as a corneal ulcer. Therefore methods for prevention and treatment can start at this point by attempting to minimize the likelihood of ulcers developing, or deal with them promptly to reduce progression into pink eye, particularly when calves are in the yards at the time of weaning.
 

Treatment will rely on antibiotic eye ointments to remove any bacteria and patches to cover the eye and prevent UV light or further dust damaging the eye. There is a pink eye vaccine (Piligaurd®), but because of the numerous bacterial agents it is important to investigate the incidence of disease in your herd and plan an effective prevention program, which will also include the control of environmental factors and fly populations. Different situations will require different approaches so give us a call at HVC if you have any questions.

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18 Byng St Holbrook NSW 2644 
02 60 362 374

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