The First 100 Days project aims to assist Australian dairy farmers make management decisions about supplementary feeding to economically increase production, while maintaining good animal health. The project is targeting outcomes of an extra $2 per cow per day profit (milk income minus supplement cost) in the first 100 days of lactation, plus an additional benefit of $100 per cow from days 100 to 300 of lactation, and $50 per cow from avoiding metabolic issues over the entire lactation cycle.