When living becomes a burden, whether from pain or loss of normal functions, I can help a family by ensuring that their beloved pet has an easy passing. Making this final decision is painful, and I have often felt powerless to comfort the grieving owners.

That was before I met Shane.

I had been called to examine a ten-year-old blue heeler named Belker who had developed a serious health problem. The dog's owners - Ron, his wife, Lisa, and their little boy, Shane - were all very attached to Belker and they were hoping for a miracle. I examined Belker and found he was dying of cancer.

I told the family there were no miracles left for Belker, and offered to perform the euthanasia procedure for the old dog in their home. As we made arrangements, Ron and Lisa told me they thought it would be good for the four- year-old Shane to observe the procedure. They felt Shane could learn something from the experience.

The next day, I felt the familiar catch in my throat as Belker's family surrounded him. Shane seemed so calm, petting the old dog for the last time, that I wondered if he understood what was going on.

Within a few minutes, Belker slipped peacefully away. The little boy seemed to accept Belker's transition without any difficulty or confusion. We sat together for a while after Belker's death, wondering aloud about the sad fact that animal lives are shorter than human lives.

Shane, who had been listening quietly, piped up, "I know why."

Startled, we all turned to him. What came out of his mouth next stunned me - I'd never heard a more comforting explanation.

He said, "Everybody is born so that they can learn how to live a good life - like loving everybody and being nice, right?" The four-year-old continued, "Well, animals already know how to do that, so they don't have to stay as long."