This is a very cruel question, but I'll answer it anyway. If you want to kill a calf, then starve it to death. You're not going to kill a calf by feeding it too much, unless you want to have it die...
It costs around $20. It could be free if you have a yard with grass and a small tub of water. It just depends on how you want to feed it. They should also be fed hay, which you can buy in big...
Turtles do not need to be fed a lot, because they are so slow and not super active. Thus, they do not burn off a lot of energy. One turtle book said a large turtle can live on one banana a week. In...