The cows taken care of by Krsna had different names, and Krsna would call them with love. After hearing Krsna calling, the cows would immediately respond by mooing, and the boys would enjoy this exchange to their hearts’ content. They would all imitate the sound vibrations made by the different kinds of birds, especially the cakoras, peacocks, cuckoos and bharadvajas. Sometimes, when they would see the weaker animals fleeing out of fear of the sounds of tigers and lions, the boys, along with Krsna and Balarama, would imitate the animals and run away with them. When they felt some fatigue, they would sit down, and Balarama would put His head on the lap of one of the boys just to take rest, and Krsna would immediately come and begin massaging the legs of Balarama. And sometimes Krsna would take a palm fan and fan the body of Balarama, causing a pleasing breeze to relieve Him of His fatigue. Other boys would sometimes dance or sing while Balarama took rest, and sometimes they would wrestle amongst themselves or jump. When the boys were thus engaged, Krsna would immediately join them, and catching their hands, He would enjoy their company and laugh and praise their activities. When Krsna would feel tired and fatigued, He would sometimes take shelter of the root of a big tree or the lap of a cowherd boy and lie down. When He would lie down with a boy or a root as His pillow, some of the boys would come and massage His legs, and some would fan His body with a fan made from leaves. Some of the more talented boys would sing in very sweet voices to please Him. Thus very soon His fatigue would go away. The Supreme Personality of Godhead, Krsna, whose legs are tended by the goddess of fortune, shared Himself with the cowherd boys as one of them, expanding His internal potency to appear exactly like a village boy.

From Srila Prabhupada’s Krsna Book ch. 15: The Killing of Dhenukasura