I've never started a horse in a bitless bridle, but in the past, the 2 year olds I've worked with I've always started them getting used to the bit and ground driving with a full cheek snaffle, but the first couple times I back them I use a rope halter and lead. I usually add the bit back in about their third of fourth ride.
First two rides are concentrated on getting them to just learn forward movement cues and whoas, so no greater refinement is needed. Bit is added in to teach anything additional.
Last edited by Indyhorse; 11-13-2010 at 10:13 AM.