Fear and stress reactions, and the performance of commercial broiler chickens subjected to regular pleasant and unpleasant contacts with human being

An experiment was conducted to determine the effects of regular pleasant and unpleasant contacts with human beings on tonic immobility (TI) response, heterophil to lymphocyte ratio (HLR), body weight, feed conversion ratios (FCR) and mortality in commercial broiler chickens. The following treatments were applied from day 1 to day 21: (1) non-handled controls received no […]

The effects of regular visual contact with human beings on fear, stress, antibody and growth responses in broiler chickens

This study investigated the effects of regular visual contact at various ages on tonic immobility (TI) and heterophil/lymphocyte ratio (HLR) reactions to handling and crating, antibody production, growth performance, and feed conversion ratios in commercial broiler chicks. Broiler chicks were exposed to (1) visual contact with an experimenter for 10 min twice daily from 0 to […]