This may be a situation where a head halter is the best solution. They are often very strange for dogs to wear and require careful, positive introduction, but might be worth a try to see if he takes to it, since they offer more control but won't be anywhere near the sensitive spots on his body. If he fights or tries to lunge/charge in one they're likely not a good option because that can cause damage if his head gets yanked around too harshly, but might be worth a try.
The other thing I can think of is putting a body suit on him under the harness to try to minimize the rubbing. Again, very dog specific, since some dogs don't tolerate any kind of 'clothing' even if they have no medical issues making their skin angry, but if he is okay with a fabric layer, I bet it'd be more comfortable than harness straps directly on the irritation.
I also agree that you can minimize walks/on-leash exercise and focus instead on lots of indoor play, training games, enrichment, and (if you have access) off-leash exercise in a safe, fenced area. Especially while he's healing.
The other thing I can think of is putting a body suit on him under the harness to try to minimize the rubbing. Again, very dog specific, since some dogs don't tolerate any kind of 'clothing' even if they have no medical issues making their skin angry, but if he is okay with a fabric layer, I bet it'd be more comfortable than harness straps directly on the irritation.
I also agree that you can minimize walks/on-leash exercise and focus instead on lots of indoor play, training games, enrichment, and (if you have access) off-leash exercise in a safe, fenced area. Especially while he's healing.
