She didn't have enough "brain" to have emotions or know what was happening to her, fv.
So, torturing her before putting her to death would have been OK then? Oh wait, that's just what they did when they dehydrated her to death.
If what you said was true, why did they administer pain killers? Why did Greer/Felos/Schiavo make sure there was music playing in her room and that she had her freakin' teddy bear as she died of dehydration?