seems as if he is in good hands. Both you ladies are teaching him manners and etiquette LOL.
I feel that once his tummy stops hurts, he will feel more secure about eating slowly. He needs love - reassurance- and security.
so looks as if things are looking up for him and soon he will become the little gentleman you hoped for.
Do not let anyone discourage you. Stay away from mean spirited people who are used to handling horses LOL.
Please keep us up to date.
Good luck!