Shape of curve lactation affects the fitting of empirical and mechanistic models applied to dairy sheep lactations in Mexico

The ability of mathematical models to represent the lactation process varies according with their structure and database characteristics. aim current study was evaluated goodness fit empirical mechanistic applied dairy sheep curves different shapes. A total 4,494 weekly test day records were analyzed. All lactations individually fitted using two (Wood Wilmink) (Dijkstra, Pollott) models. Dijkstra model showed best performance typical Wood atypical (without peak lactation). Therefore, selection must consider specific patter milk production.