author(s)
Vaibhav Purwar, Diwakar Verma, Jitendra Kumar, Mamta Sahu and Vimlesh Kumar

abstract
Heat stress occurs due to imbalance in heat gain and loss mechanism which causes disturbances in various physiological parameters. There are various physiological indices for judging the heat stress but out of them Rectal Temperature (RT), Respiration Rate (RR) and Pulse Rate (PR) shows early alteration. During summer stress, animal shows an elevation in. RT, RR, PR, levels for combating the stress. The elevation in RT & RR is in accordance to environment temperature while PR do not shows definite trend with environment. RT & RR in combination with PR can be used as a summer stress indicator in animals.