Mine did. They will eventually stop. They will establish pecking order when you put "new" chicks in. When you put that chick back in, he will be picked on to re-establish.
The first day I brought mine home they did that. They are establishing "pecking order", give em some time and they will be fine. Mine no longer fight. Little chick toes may look like worms to other chicks. When I pick them up some try to latch on!