Animals have a natural behaviour that presupposes a certain space. Some animals have a disposition for grubbing and rooting, others for perching in a space of sufficient size. Animals incapable of satisfying their natural needs and wishes may become apathetic or stressed. Their behaviour may be disastrous to themselves and to those around them. There must be rules for fox and mink farms, so that the animals will be spared unnecessary suffering and will be comfortable.
Animals are social beings.
They need space to be active in a natural way. The natural needs and wishes of the animals have to be considered. Poultry farms have to follow strict regulations. The needs of the fowls have to be considered. Fowls kept in small hen coops may be stressed.