It is not easy to really see, but shouldn't my pullet be tail feathered in by now? I mean my other three are. I don't have a front shot, but no prominent comb, so not a roo. I hope. I just think it is odd to see so much fuzz.
It took one of my girls until 13 weeks to catch up with her sisters! I wouldn't worry too much, as long as she is getting pleanty of food & not being bullied. I gave my slower one vitamins and extra protein in the form of scrambled eggs. She was less feathered out, and about a third the size of the others. Around 12 weeks she had a growth spurt, and caught right up!
ALL my pullets have fluffy butts. I call them their "panties." They look so darned cute when they bend over and show their panties, the hussies.
They do have tail feathers, though.... but I wouldn't worry. Suddenly you'll notice," Wow, they're looking like real chickens now!" And then later, again, you'll notice, "Wow, they got combs and wattles! When did that happen??"