Sri Srimad Bhaktivedanta Narayana Maharaja:
gavas ca krsna-mukha-nirgata-venu-gita
piyusam uttabhita-karna-putaih pibantyah
savah snuta-stana-payah-kavalah sma tasthur
govindam atmani drsasru-kalah sprsantyah
SB 10.21.13
"Some other sakhi said: O friend! Why are you speaking about the devis? Have you not seen the cows? When our dearest beloved Sri Krishna fills the holes of the flute with the sound flowing from His mouth and the cows hear that sweet music, they turn their ears upward and indiscriminately drink that nectar with the cups of their ears. In this way, they are tasting the sweetness of that music. Why is that so, O friend?
Taking beloved Govinda into their hearts through the doorway of their eyes, they seat Him there and embrace Him within their minds. Just see for yourself, the truth of my words! Tears of joy are gushing out from their eyes. The condition of their calves is indeed strange. Even though milk is flowing automatically from the udders of the cows, the calves, while in the midst of drinking that milk, suddenly hear the sound of the flute. At that moment the calves are neither able to spit out nor swallow the milk which they have taken in their mouths. They also take Sri Krishna within their hearts and embrace Him. By obtaining the touch of the soft limbs of Sri Krishna, their eyes overflow with tears of joy, and they stand still, exactly as they were."
Srila Bhaktivedanta Narayana Gosvami Maharaja: Murwillumbah, Australia, January 21, 2001