This trick is used to know the daily feed intake of each sow in the farrowing quarters. They move beads stringed in a wire to record the amount of feed consumed.
This trick is nothing but the expansion or the following of the trick used to control the feed intake in farrowing quarters without dispensers.
In this case the record is made by means of beads stringed in a wire, and in this way it is very easy to know the amount of feed given.
In the images we can see that there is a wire with beads (that can be moved to either side) that goes from one beam to the next one.
This system is more practical than the one that uses the water drainpipe in the cases in which the farrowing cages are oriented so the rear of the sow is near the aisle. In this way we know, from the aisle, and without the need to enter the pen, the amount of feed to be given to the animal.