he's right, dont spoil him by feeding with hand, use his special bowl instead after his food wash & keep his bowl. the next he sees u bringing his special bowl he'l know uve got some special food for him
like i said have patience in training, leaving him & hearing him whining or crying is something uve gotta handle, its jz psychology, each time he whines or bark, u come to the rescue (each time he dont see u, he'l whine, bark to make sure to come to his rescue) therefore leave him alone for a short period of time (say 2 mins) then u go to him when he's not barking, whining, crying. give a treat. increase the lead time as time goes by (make sure u only go to him when he stop barking, whining, crying)
good luck