Murder is one human killing another. People cannot murder animals and anyone who thinks they can are obviously brain damaged.
Tell that to PETA They'll cover you in red paint and probably have a topless protest on your doorstep
PETA are spastics. Murder is an unlawful killing of a member of your own species. Don't see how the humane execution of what is essentially a living product can be classed as murder.
Has to be said, though, that I think if the animal is killed in a state of terror it adds a certain piquancy to the meat