Some very cute names suggested. A 'call' name is what he will actually go by (notice I didn't say "respond to") in your home (not show ring). A name that flows easily off the tongue, can be said fast and loud, and 2 syllable ending with an "ie" sound is what I like best. Something you can yell late at night in a strange neighborhood without having the police called, or be embarrassed, haha, lots of things to consider. Have a few in mind and see what fits him and his personality when he gets home with you. And think of all the million word-plays you will be using, Dunkie-wunkie, Dunkster, Phoenie-weenie (and don't think you won't!).