Therefore in order to satisfy the mothers of His friends, as well as to convince Brahmā of the supremacy of the Personality of Godhead, He immediately expanded Himself as the cowherd boys and calves. In the Vedas it is said that the Supreme Personality of Godhead has already expanded Himself into so many living entities by His energy. Therefore it was not very difficult for Him to expand Himself again into so many boys and calves. He expanded Himself to become exactly like the boys, who were of all different features and facial and bodily construction, and who were different in their clothing and ornaments and in their behavior and personal activities. In other words, although each boy, being an individual soul, had entirely different tastes, activities and behavior, Kṛṣṇa exactly expanded Himself into all the different positions of the individual boys. He also became the calves, who were also of different sizes, colors, activities, etc. This was possible because everything is an expansion of Kṛṣṇa's energy. In the Viṣṇu Purāṇa it is said, parasya brahmaṇaḥ śaktiḥ. Whatever we actually see in the cosmic manifestation—be it matter or the activities of the living entities—is simply an expansion of the energies of the Lord, as heat and light are the different expansions of fire.
Thus expanding Himself as the boys and calves in their individual capacities, and surrounded by such expansions of Himself, Kṛṣṇa entered the village of Vṛndāvana. The residents had no knowledge of what had happened. After entering the village of Vṛndāvana, all the calves entered their respective cowsheds, and the boys went to their respective mothers and homes.
The mothers of the boys heard the vibration of their flutes before their entrance, and to receive them, they came out of their homes and embraced them. And out of maternal affection, milk was flowing from their breasts, and they allowed the boys to drink it. However, their offering was not exactly to their boys but to the Supreme Personality of Godhead, who had expanded Himself into such boys. This was a chance for all the mothers of Vṛndāvana to feed the Supreme Personality of Godhead with their own milk. Therefore not only did Lord Kṛṣṇa give Yaśodā the chance to feed Him, but this time He gave the chance to all the other elder gopīs.