Harness all the way in our house. I too feel that collars are dangerous, plus I don't want to risk anything such as a Collapsed Trachea as collars can cause this with these small breeds. BUT - if that is all that your baby will walk with - then I have no idea

Have you tried the Step-In Silk Harnesses from Cindy (chattiesmom) ?? They are FANTASTIC and very comfortable for our babies - and they don't cause any matting!