Too bad they can't live as long as us.
I am very sorry and hope your baby is confortable and has many months and even years ahead of him. Some dogs live very long!

I thought you might appreciate this:

WHY DOGS DON'T LIVE AS LONG AS PEOPLE (one heck of a story)

(Author Unknown)
Being a veterinarian, I had been called to examine a ten-year-old Irish
Wolfhound named Belker. The dog's owner, his wife, and their little boy
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, the owners told me they thought it would be
good for the four-year-old boy to observe the procedure. They felt he
could learn something from the experience. The next day, I felt the
familiar catch in my throat as Belker's family surrounded him.
The little boy 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. The little
boy, 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.
The boy said, "Everybody is born so that they can learn how to live a
good life, like loving everybody and being nice, right?" He continued
calmly, "Well, see? Animals already know how to do that, so they don't
have to stay as long."

:'''(