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🐄 Dry Period Welfare in Dairy Cows

Why the Dry Period Matters

The dry period allows the udder to rest, regenerate secretory tissue, and resist infection. The last 2–3 weeks (the close-up or transition period) are critical for the dramatic physiological changes required as the cow transitions from pregnancy to lactation. Poor management during this period is the root cause of a disproportionate number of welfare problems at and after calving.

Dry Off — The Transition from Milking

Welfare at Cessation of Milking

Abrupt cessation of milking in high-producing cows causes udder engorgement and significant discomfort for 3–5 days. During this period cows show:

• Udder swelling and distension
• Behavioural signs of discomfort (kicking, restlessness, tail swishing)
• Reduced feed intake from discomfort

Strategies to reduce dry-off discomfort include:

• Reducing milk yield before dry-off by switching to a low-energy diet 2 weeks beforehand
• Abrupt cessation (not gradual milking frequency reduction) — paradoxically leads to faster mammary involution
• NSAID administration on the day of dry-off provides pain relief during the engorgement period
• Monitor udder development daily in the first week after dry-off

Dry Cow Therapy

Dry cow therapy (DCT) — intramammary antibiotic treatment at dry-off — has historically been given to all cows. Selective dry cow therapy (SDCT) — treating only cows with existing udder infection or elevated SCC — reduces antibiotic use while maintaining udder health outcomes. SDCT requires teat sealants for untreated quarters to prevent new infection during the dry period.

Dry Period Housing and Nutrition

Housing

Dry cows are often the most neglected group in dairy farm housing decisions. Welfare requirements include:

• Adequate cubicle space — heavily pregnant cows need more space to lie down and rise than lactating cows
• Comfortable, dry bedding — particularly important for cows that spend more time lying than lactating cows
• Low stocking density — overcrowding in dry cow housing increases transition disease risk significantly
• Separation of early dry cows from close-up (transition) cows — different nutritional needs

Nutrition

• Far-off dry period (6–3 weeks before calving): Low-energy, high-fibre diet to maintain body condition without over-conditioning
• Close-up/transition (3 weeks to calving): Gradually increasing energy intake; introduction to lactation ration components
• Avoid over-conditioned (fat) cows calving — BCS above 3.5 dramatically increases metabolic disease risk
• Magnesium supplementation to reduce milk fever risk in the transition period

Monitoring During the Dry Period

• Body condition scoring at dry-off and in the last 2 weeks of pregnancy
• Daily observation for signs of mastitis (swollen, hot quarter), udder problems
• Monitoring for signs of early calving, vaginal discharge, or difficulty
• Close-up cow observation every 4–6 hours as calving approaches