The purpose of this study was to determine the in-service needs of agricultural science teachers of Secondary School in animal science teaching. The population comprised of all the Agricultural Science Teachers (47 teachers) in Enugu North Local Government Local Government Area. The data-gathering instrument was the questionnaire designed by the researcher and validated by three experts in Enugu State College of Education (Technical), Enugu. Three research questions were posed for the study and the instrument was structured on a four point opinion scale of strongly agree, agree, disagree and strongly disagree. Means was used in analyzing the data so collected. The findings of the study revealed that agricultural science teachers should undertake training in animal science components. Government should fund schools, to enable them establish livestock farm. In-service training should be organized for teachers of agricultural science to update their knowledge in the area animal science and that teachers of agricultural science should be adequately motivated. Based on the findings, some recommendation were made.