on the floor, and let your pup look at it, sniff at it, and even lick at it, if this makes him happy. next put it on him and leave it on for several minutes each day (adding more time every day) until he gets used to wearing it.
add a tug line to the harness and a small weight that your pup can pull around the house behind him. this will help him get used to the idea he has a job to do. be sure to praise him and give him treats for doing a good job.
time to start working on 'hike/mush' and 'whoa'. while he is attached to 