In pigeons (Columba liviadomestica) like any other unhandled animals, release of catecholamine and corticosteroids occurs following capturing and restriction. This hormonal response can changes some hematological, biochemical and clinical parameters that known as stress features. This study determined some stress responses in means of hematologic-biochemical changes following intramuscular (IM) injection of metoclopromide (0.5 mg/kg), atropine (0.04 mg/kg), midazolam (0.2 mg/kg) and acepromazine (0.1 mg/kg) in time zero, 30 and 90 minutes after injection. For this purpose, this study was conducted on 40 healthy male pigeons. Following injection of metoclopromide or atropine, significantly higher serum cortisol level was observed. However there was a decrease in plasma cortisol concentration with midazolam. Packet cell volume was only changed increasingly in atropine group. The merely drug that kept Heterophil/Lymphocyte (H/L) index constant was midazolam whereas in other drugs group increase of this factor was observed. Higher H/L index belongs to atropine administered group after injection. Acepromazine has the ability of maintaining basic cortisol level during surgery procedure. In contrast, midazolam achieves peak of its effect about 30 minutes after intramuscular injection which can decreased cortisol to the basic level at the moment. Blood sugar increased in all groups after handling of the birds. Higher blood glucose concentration relies on internal glucocorticoids and indicates that these drugs cannot decrease glucose in the short time period. Total protein remains unchanged during short time of the study.
Pigeon, metoclopromide, atropine, midazolam, acepromazine