introducing lead on Cola with a harness (He has been trailing it up until now) - just in the garden - but the moment he feels it tighten he kindof panics a bit and starts to fight it - I tried clicking as soon as it tightened a bit so he would kindof turn back to me - which worked once but then he wasn't interested in the food. Any ideas to make it gentler for him? I remember Tamber doing this but that was 8 years ago and I can't remember what I did !