Please identify this PBS kids show!!

This is driving me crazy. Someone must know this.

I specifically remember a PBS show... I believe it aired on Sundays... about a guy with a beard who, I *think*, lived on a farm. He had a dog named Blue, who was a puppet. I can't remember anything else about the show, except that there was an episode where Blue got sick, and the guy carried him to the vet. On the way home, he sang a song about how many miles from home they were.

I can't find a damned thing about whatever this show was, and it's making me bonkers. Someone must know.

EDIT - The guy's name *may* have been Jack. I'm not 100% sure though, that just popped into my head. I think the guy used his real name for his character, and his name may have even been in the title of the show.