I can't decide if Periwinkle is roo or pullet. He / she is a bit over 7 weeks and has been very slow to grow any tail feathers. It's just now is starting to get a hint of some. The comb is very red but doesn't have the distinct multiple rows of peas like my other roo that is the same age. By the comb color alone I would guess a roo, but it doesn't act or really look like one otherwise. What is the collective guess as to Periwinkle's sex?