Physiology& Behavior,Vol. 51, pp. 303-308. © Pergamon Press plc, 1992. Printed in the U.S.A.
0031-9384/92 $5.00 + .00
Behavioral and Physiological Responses of Dairy Goats to Food Thwarting I D. A. CARBONARO, 2 T. H. FRIEND, G. R. D E L L M E I E R
Department of Animal Science, Texas A & M University, College Station, TX 77843 AND L. C. N U T I
International Dairy Goat Center, Texas A & M at Prairie View, Prairie View, TX 77446 R e c e i v e d 11 J u n e 1990 CARBONARO, D. A., T. H. FRIEND, G. R. DELLMEIER AND L. C. NUTI. Behavioral and physiological responses of dairy goats to food thwarting. PHYSIOL BEHAV 51(2) 303-308, 1992.--Eight Nubian dairy goat does in one experiment, and eight Alpine dairy goat does in a second experiment, were randomly allotted to food-thwarted or fed groups in a crossover experimental design. Food thwarting was hypothesized to produce an emotional state analogous to frustration. After a 1-week training period during which the goats of both breeds were conditioned to being simultaneously fed in adjacent feeding stalls, frustration was induced in half the goats by feeding only alternate does. Focal animal behavior was recorded for the initial five min after feeding frustration commenced. Blood samples were collected via a jugular cannula before, during and after frustration was induced for thyroxine ('1"4), triiodothyronine (T3), cortisol, norepinephrine (NOR), and epinephrine (EPI) determinations. Food thwarting was characterized by increased plasma concentrations of NOR, and increased incidences of pawing, head movements, mouthing of objects, behaviors directed toward neighboring does being fed, and rearing (p
0031-9384/92 $5.00 + .00
Behavioral and Physiological Responses of Dairy Goats to Food Thwarting I D. A. CARBONARO, 2 T. H. FRIEND, G. R. D E L L M E I E R
Department of Animal Science, Texas A & M University, College Station, TX 77843 AND L. C. N U T I
International Dairy Goat Center, Texas A & M at Prairie View, Prairie View, TX 77446 R e c e i v e d 11 J u n e 1990 CARBONARO, D. A., T. H. FRIEND, G. R. DELLMEIER AND L. C. NUTI. Behavioral and physiological responses of dairy goats to food thwarting. PHYSIOL BEHAV 51(2) 303-308, 1992.--Eight Nubian dairy goat does in one experiment, and eight Alpine dairy goat does in a second experiment, were randomly allotted to food-thwarted or fed groups in a crossover experimental design. Food thwarting was hypothesized to produce an emotional state analogous to frustration. After a 1-week training period during which the goats of both breeds were conditioned to being simultaneously fed in adjacent feeding stalls, frustration was induced in half the goats by feeding only alternate does. Focal animal behavior was recorded for the initial five min after feeding frustration commenced. Blood samples were collected via a jugular cannula before, during and after frustration was induced for thyroxine ('1"4), triiodothyronine (T3), cortisol, norepinephrine (NOR), and epinephrine (EPI) determinations. Food thwarting was characterized by increased plasma concentrations of NOR, and increased incidences of pawing, head movements, mouthing of objects, behaviors directed toward neighboring does being fed, and rearing (p
