I am not 100% sure I am gonna say I am 90% sure
Pic 1 buff is pullet and the gray? one is a roo
pic 2 both pullets
pic 3 pullet but this one is a bit Iffy.
pic 4 pullet
Thanks Teresaann... All along I had a feeling the first one that looks gray (actually black and white... lighting doesn't show it well)was a cockerel I am uncertain of the other one as well... the one that is buff, gray and white... it acts roo-ish but could just be a bossy pullet... I like your odds!