Farm animals
Concern for farm animals is mainly focused on factory farming, where farm animals are raised in confinement at high stocking density. Issues revolve around the limiting of natural behavior in animals (like battery cage, veal and gestation crate) and invasive procedures such as debeaking and mulesing. Other issues include methods of animal slaughter, especially ritual slaughter.
While the killing of animals need not necessarily involve suffering, the general public considers killing an animal an act that reduces its welfare. This leads to concerns with premature slaughtering, such as the chick culling. This applies in a lesser extent to all food animals.
Animal welfare science is an emerging field that seeks to answer questions raised by the use of animals, such as whether hens are frustrated when confined in cages, or whether the psychological well-being of animals in laboratories can be maintained