oh! Lily, do liberty and trick training with him...
make sure you let me knowwww when you are there, i love trick training the defhr pones!!!
find out their favorite treats, look for itchy spots, do some amateur massages, grazing, and spending overall time with them!
Brush him, feed him treats (not too many though...), graze him, and even just sitting in the paddock while he is there is good
just spend some quality time w/him and graze him stroke his mane etc