Nanda Maharaja had 900,000 cows. Visvanatha Cakravarti gives this description of the cows of Vrindavana. Krishna knew every cow by name. If any cow was missing Krishna immediately chase after the missing cow and call her by name. The cows were divided into herds by color, either black, white, red, or yellow. In eac
There was a total of 108 different herds of cows. Each of the 108 herds had a herd leader. "Thus when Krishna calls out, 'Hey Dhavali' (the name of a white cow) a whole group of white cows comes forward, and when Krishna calls 'Hamsi, Candani, Ganga, Mukta' and so on, the twenty-four other groups of white cows come. The reddish cows are called 'Aruni, Kunkuma, Sarasvati, etc., the blackish ones 'Shyamala, Dhumala, Yamuna, etc., and the yellowish ones are Pita, Pingala, Haritaki, etc. (Srimad Bhagavatam 10.35.19 purport)
"As described in the Brahma Samhita (surabhi apbipalayantam), Lord Krishna on His planet,
Goloka Vrindavana, engages in tending the surabhi cows. These cows are the Lord's pet animals."
(Srimad Bhagavatam 8.8.2 purport)