The Buddha saw that this custom was cruel and mistaken. Even as a young boy (and boys are often cruel to animals and insects), he had tried to protect animals from suffering. He not only wished to save the sheep and cows and other animals from the suffering of being sacrificed, but he wished to protect the people who wanted to kill these poor animals from the suffering that would follow their acts. He knew that those who sacrificed animals were actually creating the cause for their own future suffering. The Buddha taught. It is not right to make another unhappy so that you can be happy. Everyone wants to remain alive just as you do.Therefore, if you sacrifice an animal, you are just being selfish. And I have said again and again that a selfish person finds nothing but happiness in life.