I have two RIR hens, neither has the saddle feathers that I am seeing.   Has it started to crow, or stretch out its neck when it "talks"?    One of my 98% guarantee pullet babies, is definitely a roo.  He started stretching his neck out and making funny coughing noises at about 6 weeks.  Now at 9 weeks, has become a morning alarm clock for my daughter.  He holds his body more upright also, then my other pullets.   My older hens seem to go for him first, each time that I have attempted a little integration.