The Swollen Hock Syndrome seen in this chicken and short thickened long bones are caused by dietary zinc deficiency.  Deficiency also leads to poor feathering and scaling of the skin (parakeratosis).  Decreased feed utilization and retarded growth would be expected and death is not uncommon.

Chick with zinc deficiency

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Digital Credit: Melissa Foster

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Rights: No rights reserved - image is in the public domain

Description: The Swollen Hock Syndrome seen in this chicken and short thickened long bones are caused by dietary zinc deficiency. Deficiency also leads to poor feathering and scaling of the skin (parakeratosis). Decreased feed utilization and retarded growth would be expected and death is not uncommon.

Image Resolution: 1779x2644

File Size: 3104237 bytes