Thank you everyone! Yes indeed he is a rooster so his flock mates are discovering! So much for paying to have them sexed. 2 out of 6 definitely roosters.
I am leaning towards pullet first picture, and maybe cockeral second? I am(mostly) confident in the first one being a pullet though. Just wanted to mention that I am not expert on silkies btw. So pretty much random guesses. They are all beautiful!