I have four baby chicks. I have my suspicions that at least one is a roo. The other three are questionable. One of the other three will "spar" with the one that I think is a roo. They will stare at each other then ruffle their feathers and kind of fight without pecking. Do pullets exhibit this behavior as babies too? I will take pics one day but they are only like 7-8 weeks old at this point so probably difficult to tell by looking at them. The one that I think is a roo is much bigger than the others too...