Poor boy, he will probably have some interesting scars.
Trax has several that appear to have come from similar skin shifting injuries.
Raw honey is an excellent dressing for surface wounds like this- the sugars feed and moisturise tissues while th3 acids and oxygen bearing compounds inhibit bacterial growth. Kept most and soft prevent drying out of deeper tissues and reduces scarring,
The naturalists at my local nature center swear by it for reptiles and amphibians.