Erythrocyte alterations of the laying hens subjected to thermal stress
The aim of this study was to identify erythrocyte changes resulting from heat stress in relation to different times of blood collection throughout the day. The experiment was carried out with 39 Rhode Island Red hens, in the initial laying phase, receiving standardized ad libitum feeding. The birds were placed in an environment of 20m2, with controlled temperature, divided into 2 distinct groups: Control Group with 12 animals at 16°C and Experimental Group with 27 animals at 30°C. Venipuncture took place at 7:00 am, 11:00 am and 3:00 pm.