Bahulāśva: I was lecturing in the University of Marin in San Francisco. So I was explaining that, and one man said, "This is just your sentiment. You just have some sentiment." So I asked him if he had a dog. And he said, "Yes." So I said that "When your dog becomes old, will you kill it?" So he said, "No, why shall I kill it. It's a good dog." So...
Prabhupāda: Dog is good; cow is bad. Dog is creating always nasty things, and cow is so pure, even the stool is pure, and she has to be killed.
John Mize: The question has been asked about the unfertilized eggs, why they should not be eaten.
Prabhupāda: Unfertilized, but there is potency of fertilization. You check the progress of one living entity coming out of it.
John Mize: Once the egg is laid, there is no chance for it to be fertilized.
Prabhupāda: No, egg is... The living entity is already there. Just like a woman is pregnant means the living entity is already there. So as soon as there is egg, the living entity is already there. It is taking time to come out. Just in the womb of the mother, the child is taking time to grow and become fit to come out.
John Mize: True, but the egg in the mother has been fertilized by the male sperm, whereas the egg laid by a chicken was not fertilized...
Prabhupāda: Not necessarily. They have got that potency. There are four kinds of birth: from the egg, from the vegetable, from fermentation, and from embryo. So from any of these four kinds of sources the living entity come out. Aṇḍa-ja, udbij-ja, jaraya-ja, and sveda-ja, the Sanskrit name. Sveda-ja, simply by perspiration. Just like unclean bed they produce bugs. The man gets perspiration, bad perspiration, and in contact with air, with this perspiration, the living entity comes. That is bug. This is called sveda-ja, "out of perspiration." Your coat, shirt, if you don't cleanse, or your body is unclean, you will find so many moths within the shirt. How it is coming? From the perspiration, bad perspiration, bad smell. Not that every time the male female combination required. There are other sources also.