Common Autumn Problems in Dairy Cows in South Canterbury (and How to Prevent Them)
Posted in: FAQ
Autumn is a critical time for dairy herds in South Canterbury. Changes in feed quality, weather conditions, and body condition can all affect animal health and production. Many of the issues seen in late season can be prevented with early planning and regular veterinary input.
At Aorangi Vets in Timaru, Geraldine and Fairlie, our farm vets work with dairy farmers across South Canterbury and surrounding areas to manage autumn risks and keep herds healthy going into winter and dry-off.
Below are some of the most common autumn problems we see in dairy cows, and what farmers can do to reduce the risk.
Loss of Body Condition in Late Season
Cows often lose condition through late summer and autumn, especially when pasture quality drops. Poor body condition going into dry-off can affect production next season, fertility, and overall health.
Low body condition can lead to:
- Reduced milk production next season
- Higher risk of metabolic disease
- Poorer calving outcomes
- Increased health costs
Regular body condition scoring during autumn helps identify cows that need extra feed or management before dry-off.
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Mastitis Risk Towards the End of Lactation
Mastitis is commonly seen in autumn, particularly in herds with high somatic cell counts or wet conditions.
Risk factors include:
- Late lactation infections
- Damaged teats
- Muddy paddocks
- Poor milking routines
Checking udders regularly and treating infections early helps prevent problems at dry-off.
If you notice increasing cell counts or repeated cases, it is worth discussing a plan with your dairy vet.
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Trace Element and Mineral Deficiencies
Trace element levels in the pasture start to decrease in autumn, especially selenium, copper, and iodine. Deficiencies can affect immunity, fertility, and growth rates.
- Signs of possible deficiency include:
- Poor condition and reduced weight gains
- Decrease in production
- Slow recovery after illness
- Weak calves
Blood testing and herd monitoring can help identify problems before they affect performance.
Our vets can advise on testing and supplementation plans suited to South Canterbury farms.
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Parasites and Lice in Autumn
External and internal parasites can become more noticeable in autumn. Cooler weather conditions and thicker coats can provide a great environment for lice to hide.
Common problems include:
- Lice in young stock
- Worm burdens in young stock
- Reeduced growth rates
- Poor coat condition
Early treatment and monitoring helps prevent production losses over winter.
If you are unsure whether parasites are affecting your herd, a farm visit can help identify the cause.
Dry-Off Planning and Cow Health
Dry-off is one of the most important times of the year for herd health. Cows that are not in good condition at dry-off are more likely to have problems at calving.
Before dry-off, farmers should check:
- Body condition score
- Individual cow and herd mastitis status
- Lameness
- Trace element levels
- Feed availabitily
Planning dry-off with your farm vet helps reduce problems next season and improves herd performance.
When to Talk to Your Vet
It is worth contacting your vet if you notice:
- More mastitis than usual
- Cows losing condition
- Poo production late season
- Health problems in young stock
- Unsure about dry-off planning
A short visit or herd check can often prevent bigger problems later.
Aorangi Vets provides dairy veterinary services across Timaru, Geraldine, and South Canterbury, with practical advice based on local farming conditions.
FAQ – Dairy Vet Timaru / Autumn Herd Health
Why do cows lose condition in autumn?
Pasture quality often drops late in the season, and cows may not get enough energy to maintain weight while still milking.
Should I body condition score before dry-off?
Yes. Body condition scoring helps identify cows that need extra feedingbefore winter.
Is mastitis more common in autumn?
It can be, especially in wet conditions or herds with existing high cell counts.
Do dairy cows need trace element testing every year?
In most cases trace element testing is recommended each year to ensure cows levels are sufficient to last them over winter.
When should I call a farm vet?
If you notice health problems, poor condition, production drops, or are unsure about dry-off planning, it is best to talk to your vet early.