Pullet. I've heard that the SS is a tricky breed, just like the Wyandottes. I had one that I was sure was a roo pretty much until she laid an egg. Her wattles had come in and her rose comb was red at about 3 weeks. From the lack of development going on once the wattles appeared, I'd say pullet.
don't toss that cutie out until she crows or drops an egg
don't toss that cutie out until she crows or drops an egg

