I got some pullets recently. I got them when they were two days old. They were supposed to be all hens and now that they are 3 months old one in particular looks like a roo to me. It is a Rhode Island Red, its bigger than my other red, is getting some greenish feathers around the neck, and the tail feathers are already starting to show a downward shape. I am pretty positive at this point that it is not a hen, I just wanted to see what everyone else thinks. (I do not know how to properly sex chickens) Just going by what it looks like to me.