My old dog used to do this. She (lab/husky) would eat quickly then steal the other dogs (lab) dinner. Is it possible for you to feed them in separate rooms? I know this sounds like a pain, but it worked for us.
Can you try putting Hermes in the bathroom with his dinner, and shutting the door until Skittles is done eating in the kitchen?
I know it sounds mean, but he will really only be in there for 5 min. tops - and after a few days he will realize that he is not trapped and that you will always let him out when he is done.