Nutritional Deficiency
Calves, Kids & Lambs
Iodine Deficiency — Swollen Necks in Newborn Kids and Calves
Updated 20 Oct 2026 • By Falah Nutrition Desk, Animal Nutrition Advisor
Kids or calves born with a soft swelling under the throat, weak, sometimes with thin or no hair, and often dead within a day: this is goitre, and the shortage is iodine. Hill and mountain soils are famously short of it, which is why iodised salt became law for people — and why the pregnant doe, ewe or cow needs it just as much.
Common Signs
- Swelling on either side of the throat in newborn kids, lambs or calves
- Young born weak, hairless or with sparse hair, slow to stand and suckle
- Stillbirths or death within hours
- Pregnancy going past the due date
- In adults: dull coat, lethargy, poor fertility, sometimes a visible neck swelling
- Cluster of cases in the same season on the same farm
Possible Causes
- Low-iodine soil and water in hilly areas, so home-grown fodder is low too
- Plain (non-iodised) salt or no salt fed to animals
- No mineral mixture in late pregnancy
- Some fodders (brassicas like mustard and turnip in large amounts, soybean) interfering with iodine use
- Heavy snowfall winters with a long diet of local straw only
What the Farmer Should Check
- Is the salt fed to animals iodised, and is it fed every day?
- Is mineral mixture given to pregnant animals through the last two months?
- Are large amounts of mustard, turnip or cabbage leaves being fed to pregnant goats?
- Any swelling at the throat of newborns this season?
- Has the vet seen the dead or weak young to confirm?
Feed Guidance
Iodine prevention is cheap and simple: iodised salt in front of the animals every day, and a proper mineral mixture through pregnancy. For goats and sheep, GOKA Premium Goat & Sheep Feed carries a mineral premix and is the backbone of the last six weeks of pregnancy; for cows, GOKA Dry Feed and GOKA Transition −21 do the same job. Limit brassica greens for pregnant animals to a small part of the ration. A goitrous but living newborn needs the vet's iodine treatment and help to suckle; feeding its mother properly next time prevents the next one.
Relevant GOKA Products
Pregnant Cows & Buffaloes (Dry Stage)
Healthy dry period, trouble-free calving
Pregnant Cows & Buffaloes
20 days of feeding, 300 days of benefits
When to Contact a Veterinary Doctor
Weak newborns with throat swelling need a veterinary doctor the same day. The vet can treat the surviving young and advise on iodine for the pregnant animals, and will rule out infections that also cause weak births.
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