Today was Luke's first day harnessed and pulling empty cart.
He did exceptionally well. Only got nervous when he was doing a good trot and cart started making noise behind him. A little reassurance and he was like a pro.
We made a mile round trip. Didn't phase his energy level at all. When I unharnessed him he had to run and bunny hop to burn off more energy,
It will still be another 2-3 months before I allow him to pull any weight.