A fenced in area or pen...or, a harness and leash is the only way..Please! for the safety of your baby..I have read too many stories lately about babies being hit by cars..it just breaks my heart
Just to add..My Pixie has never been let off leash yet..I do not trust her enough and won't risk it..she has a large garden to run free in..but outside..she is on her leash!