Trying to train Balto

A couple of days now I have tried to train Balto to be handled.

He is a little brave little guy and has no problems with being hand feed nor being close to a human.
But the problem is that when somebody touches him he starts to scream and turns over on his back.

I have bought a training ball for him, so I hope that running on the floor will get him to relax more when he's touched.