Kim ~ Can you take Cxxx for a walk when you take Callie?
The only reason I suggest it is that Cxxx deserves to take a walk and you're going anyway. And sometimes people step-up when they see someone else doing it.

There used to be a neighborhood dog chained to his house. There wasn't a fence in the yard, so he was chained all the time. He could walk a little, but not far. One day I asked if I could take him for a walk and let him run a little. They thought I was weird, but said okay. I did it again the next day and the next. Can't remember how many days later it was that I actually saw them taking him for a walk around the neighborhood.