I think there are many different reactions but I know loss/increase of appetite, increase in fussiness, and changes in sleep routine to be the most common. My lo is hardly sleeping the last few nights and wants to do nothing but nurse all day long.
Not after shots, but after DS was circumcised he didn't want to eat for a long time. One of the nurses said it was normal. Then he ate like crazy after several hours. It seems shots might be similar.
Re: Not nursing well after shots??