How do you feel about euthanasia LJ

What i think if people can put down animals then why cant people have
the right to make up there minds wether to die or not, with the
animals if there were in pain you wouldnt make the animal suffer and
let it live you would put it down. So why should you do this with
people if there ill and decide they want to die let them have the
choice to do it. When some one has killed some one and they get the
lethal injection thats like euthanaisa, if euthanasia is not allowed
in this country then why is it allowed in other countrys.