Dogs put to sleep are usually at the end of their lifetime , while children can possibly have their own lifetime ahead . And the difference in the amount of emotional attachment is absolutely huge . You can ' t possibly begin to compare a human being of your own blood you gave birth to with a person you love the most in the world , and some adopted mutt . Perhaps unfortunately , we are not just rational beings , but also very emotional . And the amount of morphine is usually borderline deadly as it is . And every moment of planned suffering is solely for the chance to fight off the disease , not prolonging the agony chained to bed . While this photo was taken in her last few , that moment is just one of thousands in last months . And there were very many many more beautiful , consoling , loving and generally lifeworthliving moments in those months too ! I can ' t advise or judge or have dare to propose they did anything wrong , I just can ' t , I ' m sorry . I really need to get over this photo soon , it ' s been haunting me for days now . It just hit too close to home for me .