I'm not so sure that's a pullet. It reminds me off my roo at that age. Mine took along time to grow up. I believe they don't reach full maturity until 18-24 months.
I can get a shot...ill post it tomorrow. Usually my roos are crowing by his age but ive never had a male jersey giant so i am clueless to their maturing process
To me..and I am no expert....it sort of looks like his saddle feathers are pointed and starting to curl downward. Has anyone experienced a pullet jg w that characteristic