I don't have any problem to put down small newborn rabbit bunnies or to slaughter rabbits. But I have really big problems when I must put down 5-12 weeks rabbits because they are so small but still they are bigger then the newborns. I know that you can hit them in the neck but I'm so afraid that I don't hit them hard enough (one time I was forced to hit several times...). How can kill 5-12 rabbits humanely??