Schaf nachgedacht

From BoardGameGeek:

When the sheep step out of line... This game with the charming design looks absolutely harmless, but “Schaf nachgedacht” has it all. The aim is to form rows, always at least 3 sheep together with your own shepherd. This is not easy, as the shepherd may always move, but his sheep can only be moved if the shepherd is able to see them. Once a valid row has been completed, a white sheep is exchanged for a colored one. As the sheep are constantly moving out of line due to the other player's actions, it is important to keep an overview. -description from the designer