I love it when 'supposedly cockerels' turn into pullets. In my almost a decade of chicken keeping I have been fooled a number of times by my birds. However if you look carefully you will not fail to note the difference between your pullets tail and back feathers and that of the bird in question. You will also see that EllyMac's bird have some thick legs.I think pullet. All my rir pullets had combs and wattles early, and sometimes sit funny making their tails look more like yours. I was literally convinced they were male till they all started laying eggs. However I am still new at this and could be wrong.