I saw Glenn Yarbrough perform this song and lots of others live in Lafayette, LA concert in 1968 while attending USL there.
Memory says it was in a theater in the Oil Center Plaza in Lafayette.
Great concert!!! This song has always stuck in my head even 40 years later. I did have the album of this too but can't even find one like it now.
I'm sure glad to see the lyrics again.

NO! this has no relations to Marty Robins, or cowboy songs or a dog name blue. ("when the work's all done next fall" is not the same)

If you can find any album of Glenn doing Rod, treat yourself to something wonderful. Put it on - Turn off the lights, pour a strong one if you like, lay back ... let your mind wander and be sure to have Kleenex handy.
Gary