I think this is our rooster

Please excuse the molting we are about to move the chicks to their big run and coop.

I believe this one is our rooster, it developed its bright crop thingy (new to chickens) first. Compared to the other two of the same variety.

We got four of those unsexed, so I have to imagine compared to alllll our hens which look relatively the same despite being a different sexed breed that this.

This small little one is our rooster?

What do you experienced chicken owners think.