It is important to find a treat that they will do anything for. Have these treats handy. Mine never gave me that much trouble but she will do anything for a treat. When I cut her nails she gets a treat after each foot. As far as the harness goes thats pretty normal just leave it on him while you watch him. You may want to put the leash on him when your not busy and let him drag it around. But always remember treats that they can't live without is the key to getting them to do something for you.
