I tend to avoid feeding while they're in shed. I have a few that will eat, but the majority will refuse anyway so I don't try anymore.

Just continue to make sure your temps and humidity are where they need to be and offer food on the next feeding day after he sheds.

Also, by "been shedding for about 9 days" do you mean he's actually shedding (as in you see shed skin) or is in shed (as in opaque eyes, etc)?