Honestly, I don't have a timeline on spur development. Just thinking something should be showing by now if a cockerel. Maybe a good research project on the Net. Don't worry about the tail feathers. just the neck hackle and your birds are wider and rounder at the ends, thus pullet. My pullets hatched July 19th this year have no more comb development than this girl of yours.
At What Age Do Spurs Develop on a Cockerel?
By Jen Davis
https://animals.mom.me/age-spurs-develop-cockerel-6685.html
excerpt from article:
"Spur Growth and Development
The spur starts out so small you cannot see it, but will grow as your bird develops. Some cockerels will have fully developed spurs by the time they are 3 months old. Others may take as long as 8 or 9 months before a functional spur develops fully. Spurs continue to grow as your bird ages, so an older rooster may have significantly longer spurs than a young rooster."
Karen