I have a friend who just got 2 new boar bucks that are about 5 months old a couple of days ago. one is doing great, the other is trying to nurse from the other and is not really interested in food. she saw them eating grain when she went to look at them,b so he had a good appetite. I've never had a problem with this before. is it just stress? or was he weaned late? any ideas?? or suggestions to get him to stop?