A bed has a head section and a foot section. The bed can assume a horizontal position and at least one position in which the foot section is at an angle relative to horizontal. For instance, the bed may assume a chair position, in which the head section is pivoted upwardly and the foot section is pivoted downwardly, to a substantially vertical position.Casters allow the bed to move relative to the floor. The casters can retract toward the head section of the bed as the foot section pivots downwardly toward the floor.