Abstract
Summary
Laying hens were fed 312 to 5000 ppm iodine as KI in a practical laying diet and egg production and hatchability determined. Production ceased within the first week in hens fed the highest level and production was reduced at the lower levels. Fertility of the eggs produced was not affected but early embryonic death, reduced hatch-ability and delayed hatching resulted. Hens resumed egg production within seven days after removal from iodine feeding.
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