Do I have a roos?

[mrchicken]

For some reason my chickens stick their tails up when they go outside.
My chickens are 10 weeks old and I have 2 Welummers, and 2 Austra Whites, a mix of White Leghorns and Black Australorp.
Do I have any Roos?

 

[Eggcessive]

Need pictures close up of heads and combs, sides, feet, with breed.

 

[turbodog]

Some of my chicks do, some don't. That won't help ya tell. One of the most consistant ways seems to be comb color. If ya got one that's getting darker pink/red than the others ya might have a roo.