"We have to keep some cows; never mind we have to take payment from others." That is not cow protection. Cow protection means just like Bhagavan, the Supreme Personality of Godhead, He is tending the cows. He is going, taking the cows personally from His royal palace, going to the forest whole day, working there. Is it not, cowherds boy? And taken some little fruit, mother, whatever mother has given. They are playing that.
So this is cow protection. Not that "Somebody will give money and we shall keep some third-class cows and feed there, and become cow protector." We must tend the cows very nicely so that they will give us sufficient milk. And with that milk we shall live. "No, because we are giving protection to cow, you send money for the cows and the cow protector, and earn money there and give us money. We shall eat nicely and sleep." As soon as this practice is going on, then next will be, "Give me some LSD. Give me something else." This will go on. We don't want that.
From Srila Prabhupada's lecture on Srimad-Bhagavatam 2.9.2–3 — May 1, 1972, Tokyo