I found this poem on old dogs today and wanted to share it with you. Though it is specifically about shelter dogs, I think it applies to any senior dog looking for a new home.
One by One, they pass by my cage,
They say, "Too worn, too broken, too old of age.
Way past his time, he can't run and play."
Then they shake their heads and go on their way.
A little old man, arthritic and sore,
It seems I am not wanted anymore.
I once had a home, I once had a bed,