Abstract: A characteristic feature of the invention is that in a plant comprising a plurality of multilevel container cages incorporating the life provision means for the entire period from placing day-old chicks into the cages until the time of completion of their growing, the cages are periodically displaced by a system of pushing conveyers in a sequence defined by the adopted rearing technology. Each container cage has in the upper portion thereof a frame pivotally connected to the cage and operatively connected with a pushing conveyer, the frame providing for rotating the container cage about the horizontal axis of the frame. The rotation is effected with aid of a member comprising a bell crank of which one arm has cage-engaging means, and the other arm is provided with a counterweight.