izen, The question should be what is culture not what culture. If you had asked what is culture I could respond better but when you ask what culture I cannot respond. You should know your own culture, if you were grown-up outside Nepal I understand. Who changes culture? You and I do. How long does it take to change cultural values? Sometimes centuries unless there are local laws preventing such acts. Are you also suggesting that cows should be included in sacrifice as well?? Chickens, goats and rangas have (usually male) were used for consumption and for sacrifice for centuries. As far as your sentiment about making dasain free of sacrifice I do not disagee. This is a controversial issue and people choose the side based on their beliefs or taste :-).