To maintain cheese production in less favoured regions, farmers must develop high quality cheese production. The specifications of the PDO and PGI quality labels require many changes, particularly for the feeding system. These changes must be compatible with the consistency of the farm system functioning. To build and to assess scenarios of farming systems well fitted to specific contexts, a better knowledge of the farmer's scopes is needed. We study how farmers have designed their farming systems, identifying their main characteristics. The analysis was based on comparative analysis of farmers' livestock and forage management practices. It was highlighted considering the inside and between-farms diversity of the grassland use, and the local milk production context. The 24 studied farms are localized in three wet upland areas of the South-Massif-Central. In each area, a local dairy cooperative collects milk to produce PDO cheese. To perpetuate the farm viability, famiers have implemented different livestock and forage managements depending on soil and climate conditions: increasing the sown pastures area,developing the hay-barn-drying, or changing the calving dates.Different patterns could be identified and the price of the milk has appeared like an important criterion to favour some technical changes.