Is it normal we kill pets that suffer but we don't kill suffering humans?
I really don't get people who take their pets to the vet so they can euthanize/kill them because of old age or illness.
You may argue that the animal is in pain. True, but then why don't we kill elderly people who are in pain or euthanize people with cancer?
I won't be taking my pets to be slaughtered anytime soon just because they might be a bit old or have an illness that can be easily cured by surgery. Of course getting surgery for your "beloved" pet is just too much of a bother, killing 'em off is a much easier solution.
"Whats that? Spot's beginning to show signs of old age? Off to be killed he goes!"
After all, you could just get another Spot after dumping the old Spot in a bin :)