A seven-year-old boy followed his dog into Mr. Howe's backyard. He fell into a large hole dug by Mr. Howe in preparation for a tree that had been ordered. The boy broke his arm in the fall. At the hospital, the boy was treated by a doctor employed there for four years. The doctor did not set the boy's arm because the arm was not treated correctly, it healed improperly. When the boy kept complaining, his mother took him to their family doctor who discovered the error. The boy had to have his arm rebroken so that it could be set property.

Which party (parties) would owe a duty of care to the boy? Why?