I thought coco husk substrate is usually used for humidity retention? Western hoggies are usually kept dry; I heard they don't do well in excess humidity. I only put in a humid hide when my hog is going to shed. I use aspen bedding; its good!
I hope he'll get better soon
Snakes: Scale concern
^ "coconut husk is not a good substrate. It holds to much bacteria and moisture and can very easily cause scale rot as well as get caught under the scales and cause other bacterial issues."