Angus cattle have significant economical values. Individualized management is expected to improve the efficiency and prevent financial loss in the farming industry. However Angus cattle, being all black, are a challenging case for visual recognition. We present a system for image segmentation and identification on Angus cattle using deep learning methods. Two databases of cattle were first collected and annotated, one is frontal face only, captured in a lab setting with controlled lighting and pose in the same day. The second was captured in a farm with natural light and background at three different days. The full body of cattle is captured from different angles. Using three popular neutral networks: PrimNet, VGG16 and ResNet50, we have evaluated a number of design choices for cattle identifications, including face only, face + body, and with/without background segmentation. The best result is obtained using face + body image without background, achieving 85.45\% accuracy with the VGG16 net. If we use images captured under different days as training and testing datasets, the accuracy drops dramatically below 10\%. It remains as a challenging open problem to be resolved.