Source, please?
Roman religious sacrifices
http://www.mariamilani.com/ancient_rome/sacrifices_in_ancient_rome.htm
Roman religious sacrifices
http://www.mariamilani.com/ancient_rome/sacrifices_in_ancient_rome.htm
Ancient Greek sacrifices
http://atheism.about.com/od/aboutreligion/fl/Method-of-Sacrifice-in-Ancient-Greece.htm