Satsvarūpa: "During the reign of Mahārāja Yudhisthira, the clouds showered all the water that people needed, and the earth produced all the necessities of man in profusion. Due to its fatty milk bag and cheerful attitude, the cow used to moisten the grazing ground with milk."
Prabhupāda: That's it. Because the cows were very cheerful, the milk was dropping from the milk bag so that the grazing ground became muddy. It was muddy not with water but with milk. So how much milk was being delivered by the cows. Because, the reason is . . . why? They remained cheerful. What is that? Second line?
Satsvarūpa: "Due to its fatty milk bag and cheerful attitude . . ."
Prabhupāda: "Cheerful attitude." If . . . cows know. They have got intelligence that "We will be killed." Therefore they are not supplying sufficient milk. They cannot, just like if your mind is full of anxiety, you cannot work fully. So because they are denied this cheerfulness, you are getting less milk. If you keep them cheerful, they will give more milk. This is nature's economic development. Artificially you cannot increase the production of milk. But according to the instruction of scripture, if you keep them cheerful, without any fear, they will deliver double milk. So therefore in the Bhagavad-gītā it is recommended that cows should be protected in the human society. If you want to eat meat, you can kill insignificant, small animal, but don't kill cows. There are other animals—hogs, pigs, goats, lambs or birds, so many, fish—if you are at all interested in meat-eating; but don't kill cow. (aside:) Find out this verse from Bhagavad-gītā, kṛṣi-go-rakṣya-vāṇijyam vaiśya-karma svabhāva-jam (BG 18.44). Those who are vaiśyas . . . economic development . . . vaiśya means economic development. They should produce ample food grains and give protection to the cows. Just like our Kṛṣṇa's life, His foster father was a vaiśya. So he is keeping so many hundred thousands of cows, and Kṛṣṇa was entrusted to take charge of the calfs, Kṛṣṇa-Balarāma. So although They were very rich father's son, still They were taking the calfs in the forest for tending in childhood. Still . . . you have seen in Māyāpur? The small children, they are taking care very nicely of the cows. After all, it is animal. The small child has got a stick, and he has been trained up how to allow them to graze. They have done.
So according to Bhagavad-gītā . . . and that is very nice, that economic development means you produce more food grains and more milk. Then it will solve all posit . . . there will be no scarcity of food or happiness. Our these Kṛṣṇa Society young boys and girls, they have prepared so many nice things from milk. It is nutritious, very palatable, every . . . everything. And we take food grains, fruits, milk preparation, that's all. That is very easily available. You can get enough fruits if you cultivate trees and plants. That is recommended in Bhagavad-gītā: patraṁ puṣpaṁ phalaṁ toyaṁ yo me bhaktyā prayacchati