The growing demand for animal products led to an increase of the number and size of animal farms across the world. In this context, the livestock farming industry faces the challenge of integrating high complexity processes, while ensuring to meet sustainability standards. Therefore, decision support systems in the livestock sector must be established to help farmers assess the impact of different strategies before putting them into practice. In this paper, we present a monitoring and management platform that allows farmers to optimize their activities, to manage resources, to reduce costs and to minimize the environmental footprint. The FarmSustainaBL platform follows a farm-level approach for modelling and simulation of specific activities to assist decision makers and farmers in the decisional process, by providing insights into their managerial practices.