Dehydration fever is most common cause of fever this days due to high enviormental temp. I recomend increase in the feed intake lime water with pinch of salt for better water retention and temperature monitoring. If fever above 100 give paracetamol syp maximum 4 times a day and tepid sponging if it does not subside inspite of antipyretics.
Next Steps
make sure there is a good ventilation and favorable temperature in the room to avoid hyperthermia.
Health Tips
Temperature monitoring 2-4 hourly and also frequency of urination wil help us asses the fluid status and also give a clue for suspected infection.