Looking good! How much experience do you have with riding, training, breaking, etc.? There are many things that you can be doing now while he is not feeling well that he will pay little attention to, but that will help later. One thing I suggest is to drape a lead rope over him while you are walking around him. Lay it over his neck and pull it off slowly. Lay it over his back and pull it off and let it bump his legs. Do the same over his rump, shoulders, head, ears, tail and let it bump and graze and wrap around his legs. Don't let it get tangled or looped back on itself, just use the end. Do the same with a longe whip, using both the lash and the handle ends. The other is to touch him all over, and I mean ALL OVER. Run your hands over every inch of his body including inside his ears, nose, mouth (careful!) between his front and back legs, all over his belly and legs. Start slowly with familiar areas and work slowly in the areas that he is not used to being touched. Make sure to position yourself so that he will do little harm if he gets upset and rears or kicks. Will he pick up his feet for you? That is another thing that can be done while he is calm and not at his best. Once he gets to feeling good, it may be more difficult as he will have more pent up energy to blow off! One last unsolicited suggestion. Sorry! Start now on voice commands. Both of you need to agree on what will be used and both need to use them the same way. I use "waaalllk" slow, soothing, and drawn out. Say it that way whenever he is being lead or even if he is following you at a walk. He needs to associate the word with the gait. I use "jog" short and sharp with emphasis on the 'g' for trot. I say "HOPE!" for stop and "Whhoooa" for settle down or calmdown or as reassurance if my horse is getting excited or nervous. Then I use "caann-TER!" for a slow gallop. Once he knows walk, jog and hope, then teaching him to lounge will be easy and so will guiding once you are on his back. Heavy breeds are typically gentle and easy to handle and train so you may be surprised at what you can do yourself. I wish I were closer, and I could come over in the afternoons and help you with him, wouldn't that be fun? I miss training.....