I got my new chicks to add to my flock 2 weeks ago. I got 3 production reds and 3 RIRs. One died, I went back to get a new chick and all they had were straight run. I choose a New Hampshire red. After I put the NHR in the brooder I noticed this particular chick has always been a lot larger than my other chicks. It's feathers don't fall all the way down around to its rear end and its tail feathers aren't getting very noticeable like the others. Is this a tell tale sign of a rooster? I already have a rooster and would rather not add another roo.