Aggressive Behavior in Chicks (toward people)

[CovenantCreek]

1. What does it look like?
2. By what age does it appear?

Whenever I go into the coop with my 3 week olds I'm mobbed by the Delawares. They seem to get great enjoyment out of pecking at my pants, my boots, my whatever is within reach. So far I don't read any of it as aggression, just curious chicks, but I would like to know what behaviors to be on the lookout for as I try to decide which of the boys will have to go.

 

[TomOBedlam]

I have no idea, being completely new to this myself, but I'd love to hear the answer, too.

I swear these cute little male packing peanuts know what's in store for them, and I'm afraid they might try to get me before I get them...

 

[beekybuzzard]

Probably more curious than anything else, My Delawares are very docile although they do love to follow me and my 2 dogs around any time I let them.