Housing systems for farrowing with movable floors: The solution to reduce crushed piglet mortality in the farrowing pens. The Vari Plus floor is a sophisticated system that ensures piglets cannot get caught under the sow when the sow sits or lies down. The floor operates as simply as it is effective. When the system detects that the sow is going to sit or stand up, it will move the section of the sow up. Now the piglets cannot get under the sow, but can walk around freely. When the sow lies down again the sow section moves back down, so that the piglets can drink safely.