The aim of this research was to identify the veterinary units' role in livestock development, by identifying the level of the veterinary units' role in developing livestock in both Kafr El Sheikh and Dakahlia governorates, to determine the significant differences between the role of veterinary units in two governorates, and to investigate the factors that affecting the veterinary units' role in developing livestock in both governorates. The sample involved 163 veterinary units, representing 63.2% of the total number of veterinary units in the two studied governorates, 63 of these veterinary units are from Kafr El Sheikh governorate, while the other 103 are from the Dakahlia governorate. Data were collected using a questionnaire by personal interviews. Furthermore, the statistical methods used in this study are descriptive analysis, T test, correlation coefficients, and multiple regressions.  The results showed that according to the opinions of the director of the studied veterinary units, the role of the veterinary units for the development of livestock in Kafr El Sheikh governorate surpassed their counterpart in Dakahlia, with a significant difference, as it was found that (53.3%) of those units under study had a high role in Kafr El Sheikh Governorate, compared to (75.3%) of them in Dakahlia had a medium role and that the most important activities for that role for the units in the research sample were: providing treatment to sick animals, confronting sudden crises of epidemics or diseases, facilitating livestock insurance procedures for breeders, and finally vaccinating livestock against diseases, and that the ten independent variables Collectively, it explains about 39.8% of the variance in the role of the units, the research sample for developing livestock in Kafr El-Sheikh Governorate, compared to 57.1% for its counterpart in Dakahlia, and that the variables most contribute to explaining the variance were: the availability of the administrative components of the unit, the benefit from training in the veterinary field, and the availability of the operational components of the unit Finally, satisfaction with the technical and administrative services of the unit.