the bird has not had an opportunity to associate the bare hand with food.
Food should not come from the bare hand (IMO) if in the manning stage. Post above gives good insight to manning and not enough time yet. But the bird should be feeding from the glove..........jumping to the glove and then flying to the glove. I would suggest getting William Oakes book "The Falconers Apprentice" as it is an excellent source on training. Food is associated from the glove not a bare hand.............maybe I am missing something. Your sponsor should also be of more assistance on the training/manning. Weight (under) may be an issue if very under weight............JMHO