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48 Railway St, Eltham, Taranaki  |  Open Mon-Fri 8am-5pm  |  Emergencies and After Hours Phone 06 764 8196

June Newsletter 2025

June Editorial

As we sit down to write this editorial, our boss is away—but the clinic team is still in full swing! We’d like to extend a warm welcome to our new clients and say farewell to those who have moved on. If you haven’t had an RVM (Restricted Veterinary Medicine) consult with your key vet yet, now is a great time to contact the clinic and get this booked in.

We also have some important dates coming up:

  • 8th July – Free Farmers' Evening at the Clinic. Join us for an evening that includes a recap of last year’s reproduction results. We’d love your input—head over to our Facebook page to vote on additional topics you'd like covered.
  • 16th July – Spring First Aid Course. Aimed at new entrants to the dairy industry, this course is a great introduction to on-farm animal care and emergency response. Contact the clinic for more details or to register.
  • 17th July – Annual General Meeting (AGM). Our AGM will be held at the clinic. With one of our board members retiring, nomination papers are now available at the front desk. We encourage your involvement!

You may have already met Tina, our new vet, out on your farms. She'll be working across both dairy and equine cases—please join us in giving her a warm welcome to the team.

NOTICE OF MEETING

NOTICE IS HEREBY GIVEN that the ANNUAL GENERAL MEETING will be held at the Vet Clinic, Railway Street, Eltham

on Thursday 17th July 2025 commencing at 12.30pm.

AGENDA

1. Apologies

2. Minutes of the 2024 AGM

3. Annual Report

4. Adoption of Balance Sheet

5. Appointment of Consultant Chartered Accountant and Financial Reviewer

6. Election and confirmation of appointment to Executive

7. Directors Remuneration

9. General Business

Mr P Muir (dairying member) to retire from the executive by rotation is available for re-election. Mr S Matthews retires by rotation and is unavailable for re-election.

Nominations for these positions must be received by the Secretary by midday Thursday, 3rd of July 2025. Nomination forms are available at the clinic.

Financial Accounts for the year ended 31.3.2024 will be available on request as soon as the financial review is complete.

Nitrate Poisoning in Dairy Cattle – A Seasonal Risk to Watch

As we head into the cooler, wetter months, nitrate poisoning becomes an important risk to keep front of mind—especially for dairy farmers grazing cattle on rapidly growing pasture or crops like brassicas and cereal grasses.

What is Nitrate Poisoning? Nitrate poisoning occurs when cattle consume plants with high nitrate levels. Under normal conditions, the rumen converts nitrate into harmless ammonia. However, if nitrate levels are excessive, the conversion process is overwhelmed, resulting in the formation of nitrite—a toxic compound that reduces the blood’s ability to carry oxygen. The result is oxygen starvation, even though the lungs are functioning normally.

When Are Nitrate Levels Highest? Nitrate accumulation is most likely during periods of rapid plant growth, particularly after droughts or frosts (stressed plants), cold cloudy weather (plants unable to photosynthesis and convert the nitrate), or nitrogen fertiliser application quite late in the season. Ryegrass, oats, green feed crops, and some brassicas (like kale and chou moellier) are common culprits.

Signs to Look For

Symptoms can appear within hours and may include:

  • Rapid breathing or gasping
  • Muscle tremors
  • Weakness or staggering
  • Brown “chocolatey” or blue mucous membranes (Check gums, eye conjunctiva, vulva)
  • Sudden death in otherwise healthy animals, can occur in high numbers

If you suspect nitrate poisoning, remove stock from the pasture immediately and call the vets. This is an emergency—early treatment with methylene blue can be life-saving.

How to Reduce Risk

  • Test before grazing: Pasture nitrate testing is inexpensive, bring a sample into us before starting to feed crop/pasture in question
  • Graze in the afternoon: Nitrate levels tend to be lower later in the day.
  • Avoid hungry stock: Ensure animals are full before introducing them to potentially risky paddocks.
  • Gradual introduction: Slowly build up exposure to new crops (e.g. kale) over 5–7 days.
  • Monitor fertiliser use: Be cautious after nitrogen application—wait at least 10–14 days before grazing.

Need Help? We can arrangenitrate testing and are happy to advise on grazing management and risk assessment. Don’t hesitate to give us a call if you’re unsure—prevention is always better than cure.

Why Body Condition Scoring Matters More Than You Think

For many Kiwi farmers, Body Condition Scoring (BCS) is a familiar term — but it’s easy to overlook just how valuable this simple tool really is. Used properly, BCS is one of the most effective ways to improve herd performance, reduce animal health issues, and support more profitable farming. Having cows in the right condition at the right time isn’t just about improving welfare, its about improving reproduction and productivity.

Why Good BCS is Crucial:

Better Reproduction

Cows in optimal condition at calving (BCS 5.0 for mature cows, 5.5 for heifers and 2nd calvers) have significantly better reproductive performance. They return to cycling sooner & conceive earlier in the mating period

Improved Milk Production

Cows in optimal condition at calving can mobilise body reserves efficiently, and produce more milk, increasing farm profitability. Cows that calve in good BCS will produce more milk at peak. It is more efficient to dry off early to reach BCS targets than milking on in late lactation chasing production at the detriment of BCS.

Fewer Health Issues

Young cows below the ideal BCS target are at higher risk of: Mastitis, Uterine infections, Poor immune function

When Should You Be Body Condition Scoring?

BCS isn’t just a one-off job — it’s a seasonal management tool. To get the most value from it, here are the critical times to assess your herd:

Prior to planned Dry-off

  • Set cows up for a successful transition to calving.
  • Gives time to draft and dry off, decrease milking frequency or preferentially feed lighter cows.

At Calving

  • Measuring BCs at calving, were targets met? (5.0 for cows, 5.5 for heifers) if not put plans in place to reach target next season. Cows below target can be identified and managed to minimise BCS loss prior to mating

Pre-Mating

  • Ideally, cows should lose less than 1BC between calving and mating. It is hard to minimise losses with feeding as NZ cows are bred to turn turn feed into milk and to use body fat to do this. This is why reaching BCS targets at calving is so important
  • Excessive weight loss prior to mating is directly linked to lower conception rates.

The Cost of Getting It Wrong - Poor condition costs money.

  • A cow calving at BCS 4.0 rather than 5.0 can take an extra 10–15 days to get in calf. ( 2kgMS/cow/day x 10days x $10/kgMS =$200.) Milk production increase from calving at BCS 5 vs 4 is 12kgms/cow (x $10 = $120). Total losses for cow calving at 4 rather than 5 =$320 at a $10 payout. Multiply that across a herd and the lost value of milk and extended calving spread quickly add up.

Body Condition Scoring isn’t just a “nice to have” — it’s a core part of good herd management. In New Zealand’s pasture-based systems, where margins can be tight and timing is everything, getting BCS right means healthier cows, better production, and stronger profits.

We have accredited vets who can arrange help scoring your herd or developing a BCS-based management plan so get in touch.

Multimin

Multimin is an injectable mineral supplement with copper, selenium, zinc and manganese proven to work in NZ production systems. This is a mineral supplement that can be used at many different times to give many different advantages.

Trial work done in NZ has proven to reduce rates of clinical disease and death in calves by over 50%. Diseases such as scours and navel ill have been shown to halve in number when given a shot of Multimin within 24 hours of birth, even if your number of sick calves was low to begin with. It is recommended to give 1mL/50kg, so for a 40kg calf give a 0.80mL shot. This costs roughly 80c per calf exc GST, seems like a no brainer for such a big head start for a young calf.

Another point in time to consider a Multimin shot is 4 weeks pre-calving in your herd, this has been shown to reduce rates of sub-clinical and clinical mastitis.

Premating is the other recommended time of giving a multimin shot, research has shown significant reproduction benefits, such as a 3.3% higher in calf rate, an average of cows getting in calf 3.4 days earlier an estimated 4:1 ROI from a 4 week pre-mating shot.

Multimin has brought out a new product called Multimin Evolution. This has the same mineral make up as Multimin, however it contains higher levels of Zinc. It has 50% more Zinc than any other trace mineral product in NZ. Specific zinc benefits proven in cattle studies include:

  • Improved calf health
  • Better hoof health
  • Reduced somatic cell counts
  • Higher in-calf through pregnancy maintenance

Multimin is not the only trace mineral supplementation we offer at Eltham Vets, however it is the only trace mineral supplementation shot that has specific NZ research to back it up. Other options include Marks-Min, Prolaject B12 (one with and one without selenium), Multiboost B12, and VetTrace (oral daily supplement, one with and without copper).

Preparing for Calf Rearing: Protect Against Rotavirus

As calving season approaches, now is the time to plan your calf rearing strategy and vaccinate your cows to protect against Rotavirus, a costly and aggressive cause of calf scours.

Understanding Rotavirus

Rotavirus affects calves aged 3 days to 6 weeks, spreading via the faecal-oral route. The virus damages gut lining cells, causing severe diarrhea, dehydration, and illness. Outbreaks can lead to high mortality rates, and surviving calves often suffer permanent gut damage, reducing nutrient absorption and lifelong growth rates.

Vaccination: A Key Preventive Measure

Vaccinating your cows against Rotavirus boosts antibody levels in their colostrum, providing newborn calves with critical immunity. Discuss with your vet to choose the best vaccine for your herd, such as Rotavec or BioBos. Key points:

  • Timing: Administer vaccines 2–3 weeks before the planned start of calving to enhance colostrum quality for 9–10 weeks.
  • Mechanism: Vaccination stimulates the cow’s immune system to produce Rotavirus antibodies in her colostrum. When fed within the first 12 hours of birth, these antibodies are absorbed through the calf’s gut into its bloodstream, providing immunity for the first 3 months while the calf develops its own immune system. Absorption decreases after 12 hours and stops by 24 hours.
  • Herd Coverage: Vaccinate all in-calf animals, including heifers, to reduce environmental viral load, even if their calves aren’t kept as replacements.

Maximizing Vaccination Success

To ensure your vaccination program is effective:

  • Colostrum Quality: Feed calves high-quality colostrum (>22% Brix) from vaccinated cows within 12 hours of birth.
  • Calf Shed Hygiene: Ensure sheds are spacious, dry, and well-drained to prevent pathogen buildup. If Rotavirus was an issue last season, remove old bedding and disinfect sheds thoroughly.
  • FPT Testing: Arrange Failure of Passive Transfer (FPT) testing early in the season. We can blood-test 10 calves (1–7 days old) to confirm adequate colostrum intake. Contact the clinic to book.

Vaccine Options

Our clinic stocks two vaccines, all boosting antibodies against Rotavirus, Coronavirus, and E. coli:

  • Rotavec: A trusted option with a long track record.
  • BioBos: Introduced last year, it showed excellent results, is slightly cheaper than Rotavec, and causes minimal injection-site lumps.

Plan your vaccination and colostrum management now to give your calves the best start. Contact our clinic to discuss vaccine options or schedule FPT testing.

Vettrace 5

Calving is the ultimate challenge to the immune system, as the barrier that stops pathogens from entering the uterus is opened during calving. At the same time the cow faces large demands due to colostrum formation and lactation. This drains energy, protein, fats, macrominerals (Ca, Mg, P) microminerals (Cu, Se,I) and vitamins. Both the udder AND the immune system compete for the golden currency of the body which is glucose. When the immune system is challenged, glucose is diverted away from the udder, impacting milk production. Microminerals/trace mineral supplementation has the common theme; Copper, Iodine, Selenium, Zinc, Cobalt (B12 formation) and vitamins are involved in effective immune function (amongst an additional multitude of enzymes, hormones and cell processes in the body).

  • Vet Trace-5 is specifically formulated for Eltham Vet clients where we know antagonists (molybdenum, sulphur, iron) are likely blocking absorption of copper.
  • It contains Iodine (10mg), Selenium (5mg), Cobalt (10mg), organic Zinc (360mg), and organic Copper (125mg) to be added to water or feed daily
  • Begin supplementation a minimum 3 weeks out from calving and continue through lactation
  • General newsletter advice is a starting point – amounts and additional additives can be discussed with your vet to meet your herd’s production level. Vet Trace5 will meet the requirements of a simple, cost-effective trace mineral supplementation program.

Hi, I’m Tina! I graduated from the University of Edinburgh in 2016 and made the big move to Taranaki in 2019. I’ve spent the last few years at Energy Vets in Inglewood before making the move to Eltham. I’ve always had a strong interest in dairy and horses, particularly reproduction, calf health and surgery. When I’m not working, you’ll usually find me in the CrossFit gym, at the beach or catching up with friends.

Eltham Vet

Eltham Vet Services is a 10-vet practice that has served the farms and family pets of Central and South Taranaki with distinction since 1937. For your pet’s healthcare & your peace of mind contact or visit us.