Those sorts of behaviors don't say much. Some pullets really like to play the chest bump game. Although people say that cockerels can be more friendly, I've not personally seen it in birds that young. Older birds is another matter and there h I have seen the trend; I think one of my 8+ month old cockerels would genuinely be happy to be carried around by me all day, but at a few weeks old his sister wanted more attention from me.One of them is bigger and likes to really bump with Marshmallow. The other is very friendly though and likes to be held, so I feel like that makes it more of a tossup.