Hey, Carole! It's amazing how we get so attached to these little guys so quickly. It's not at all surprising that you wonder how the kitty is doing- is he happy, is he being cared for, does his new family love him? It goes with the territory. Do you have any specific reason to be concerned other than the new owner hasn't returned any of your calls? Did you see any indication that the new owner might neglect kitty or fail to properly care for him? How did the kitty react to his new owner when they first met? Cats are very perceptive when it comes to us humans. Two weeks isn't all that long. You still may hear from the new owner.