I don't know, it depends on where the scabs are. The first one looks like if the scabs are on the back half of the body, he might still be able to reach them, but I have never seen one of those in person to be sure.

Tax: Cat Cone Conversation:
That is one of my Jersey Giants. All the other littles are fully feathered, but the Jersey Giants still have pin feathers on their backs (basically, still naked on their back, but the wings mostly cover it, so it doesn't show well....only a little...in the pic.)