Sunlight Level
0%
No sunlight — Winter. Vit D3 nil.
☁️ Winter🌤 Spring☀️ Summer
Vit D
5%
HY-D Supplement
HY-D (25-Vit D)
Not active. Cow relies on sunlight alone.
Blood Calcium
LOW
Ca²⁺ Status
Deficient
Hypocalcemia risk ⚠️
☀️
UV: 0%
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⚠️ CALCIUM DEFICIENT — HEALTH AT RISK
Rumen
Liver
Kidney
Bone
Gut Wall
Udder
Hoof
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Condition
Reduced Milk Production
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Low Vit D — calcium absorption blocked.
Vitamin D Pathway
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Organ
🫁
Organ Detail
Rumen
Role in the HY-D process
● Active
🖱 Organ visualiser
Where this organ sits in the pathway
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