Research Note: Antibody Responses to Sheep Erythrocytes in Early (k+) and Late (K) Feathering Chicks in a Broiler Line

Antibody titers in response to injections of sheep erythrocytes were measured in several different groups of early and late feathering chicks from 8 to 35 days of age. Antibody titers and rate of development of antibody responses were similar in early and late feathering chicks, reaching a plateau by 21 days of age.