“For human happiness, one must care for the animals, especially the cows. Vasudeva therefore inquired whether there was a good arrangement for the animals where Nanda Maharaja lived. For the proper pursuit of human happiness, there must be arrangements for the protection of cows. This means that there must be forests and adequate pasturing grounds full of grass and water. If the animals are happy, there will be an ample supply of milk, from which human beings will benefit by deriving many milk products with which to live happily.” (Shrila Prabhupada, Shrimad Bhagavatam, 10.5.26 Purport)