Barnett, J. L., Hemsworth, P. H. 1986. The impact of handling and environmental factors on the stress response and its consequences in swine. Laboratory Animal Science 36, 366-369.

Animals who are fearful of humans show a marked increase in corticosteroid levels both in the presence and in the absence of people. A poor human-animal relationship, in which swine are fearful of human, should be avoided in animal production and experimentation.