Along with the increasing consumption of eggs due to population growth, causing breeders to find ways to maximize livestock productivity. One of the laying hen farming techniques commonly used so far is the battery-cage farming system where the livestock can move freely in the cage. In addition to this system, there is now a new system that allows poultry to move more freely, namely the cage-free farming system. Cage-free farming system does not use cages, thus allowing livestock to live like in the wild according to their natural habitat. In developed countries, poultry farmers have started to switch to using the cage-free system because it is considered to be pro-animal welfare.