The multi-level perspective for analyzing transitions presents the niche-innovation as the seed of new productive paths : its diffusion through the current regime could cause its change. We apply this analytical framework to study the trajectory of innovation of the “Bleu-Blanc-Coeur” (BBC) case based on a change in practices of animal feeding to improve the health value of products. By analyzing the interactions between the actors of the dairy sociotechnical systems in France, we examine how the current systems and the BBC niche-innovation coevolve, and how new standards are built in the sector. This case study shows how technological, organizational, and institutional innovations are combined. We propose to consider these changes as the seeds of a transition in the dairy sector, according to the future strategy of actors as regards the diffusion of this innovation. This analysis reveals the complexity of coevolution processes.JEL Codes : B52, D2, L1, O3, Q1, Q5