With Christ blood we no longer have to anoint our houses with lamb's blood as the Isrealites did for protection (the first passover). Our spirit our hearts are anointed in Christ's blood for all eternity once we except and believe He is who He says He is. His blood is sufficient. In the old testament times Christ had not come yet so they had to make sacrifices to be cleansed from their sins, when Christ made the ultimate sacrifice, His life, it was sufficient and no longer a need for animal sacrifices. Yes we still make sacrifices, but it is choosing not to do certain things that would not glorify God.