7 week old Welsummers charging out of coop with hackles on end!

[HelenB]

I have two Welsummer pullets (or so I was lead to believe), age about 7 weeks, who have taken to exiting the coop with all their neck feathers standing straight out! My first reaction was "my goodness, what is that?!?"

Now they've done it two days in a row! When I open the pop door the Buff Orps or Barred Rocks usually lead the way, followed by the more cautious Giants and Welsummers. Mostly what I'm wondering is, is this roosterlike behavior starting to develop before comb and wattles?

Thanks!