Drive!

What gives a dog the "drive" to want to comfort people?  

It's a question that I don't think anyone has found the answer.  Yet day after day, Caring Canines at Mayo Clinic Hospital approach patients that are so sick with disease that sometimes their bodies are deformed because of surgeries or burns from radiation treatment.  I've seen "humans" look away, so as not to see their scars, but Cora and her canine peers only see a face that needs to smile or a hand that needs to reach out and touch a comforting furry body.  Is it therapeutic?  Just ask anyone that has visited with a therapy animal, and you'll get a overwhelming "YES"!