perhaps their is a distinctive smell that one has that the other has... or there is something about the room that causes him to move to one direction or the other and then in turn causes him to eat the hay that he is then closest to..

you cannot from these judgements assume that he is going to eat one way or another..

there is countless possible factors that could lead him to go to one or the other if not eat both or starve himself..

one factor from the many factors could be that his first instinctive move would be to try and escape the room and then after he has tired himself he will then eat the hay that he is closest to

Nick