Lama Sanan says that it is during gal tyalgn rituals that people make animal sacrifice, which is sin in itself (kilnts). According to him, this is a remnant of shamanism. Sanan says that there is a sutra about one non-Buddhist teacher whose disciples offered him animal sacrifice, therefore making his position in hell even worse. Sanan also points out that traditions change, and if innovations bring improvements, they can be adopted.