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Rearing Well-Grown Dairy Heifers

Heifers

Rearing well-grown dairy heifers is a fundamental aspect of dairy farming in New Zealand. These young animals are the future of your dairy operation, and their growth and development are crucial for the long-term sustainability and profitability of your farm. This is an area where performance is often below targets. Let's delve into the key aspects that every New Zealand dairy farmer should focus on when rearing their heifers.

Nutrition Management:

Providing a well-balanced and nutritionally adequate diet is essential for optimal growth and development. This applies from calves right through to entering the herd and is an area where New Zealand's youngstock are often left behind. Ensuring adequate supplementation of trace elements trace elements like copper and selenium is crucial for skeletal development, immune function, and overall health. New evidence regarding heifer shoulder fractures suggests a significant component from under-nutrition, adding to the benefits of getting this area right.

Regular monitoring of body condition score (BCS) and growth rates allows adjustments to feeding regimes as required to prevent underfeeding, promoting steady growth, and allowing preferential treatment of heifers that are falling behind.

Health and Disease Management:

Ensure vaccinations don't lapse while youngstock are away at grazing, particularly for leptospirosis and bovine viral diarrhoea (BVD). Both of these are essential to protect heifers from infectious diseases that can impede growth and reproductive performance. BVD vaccinations should ideally be administered before youngstock leave for grazing and boosted at least 4 weeks before mating.

Proper internal parasite control strategies prevent compromise to growth and selection for drench resistance which is high risk on youngstock grazing blocks. Drenching should be performed based on faecal egg counts and with a product recommended by your veterinarian.

Monitoring and Record Keeping:

Regular monitoring of growth rates, reproductive development, and overall health status through systematic record-keeping facilitates timely interventions and adjustments to management practices. Tracking growth to targets, particularly at mating and calving, is crucial for achieving optimal reproductive performance and ensuring heifers are adequately prepared for the demands of lactation. Aim for heifers to reach approximately 60% of their mature body weight at mating and 90% of their mature body weight at calving.

Preparing to Enter the Herd:

Before leaving grazing and returning to the dairy platform ensure heifers are in good health and fit for transport. Have a plan in place around teatsealing which should be performed at least 4 weeks pre-calving. This can be performed at the run-off through the teatseal trailer or after they have returned to the home farm. Talk to your Franklin Vets technician and veterinarian about what the best options are for your youngstock and tips for training them in preparation for our team.

Rearing well-grown dairy heifers requires a comprehensive approach that encompasses nutrition management, health and disease management, and meticulous monitoring and record-keeping, with significant importance of achieving weight targets at mating and calving. By prioritizing these key aspects and implementing best management practices, New Zealand dairy farmers can maximize the potential of their heifers, ensuring a productive and sustainable dairy herd for the future. Your veterinarian can develop a youngstock plan that ticks all your desired boxes and ensures no heifer gets left behind.

Dr Leah Wakeford, BVSc (Dist.) Veterinarian & Branch Manager, Waihi


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