Help sexing 5 month old Light Brahmas!

[knorzchickens]

First time hatching chickens and we have two beautiful light Brahmas. I think they’re both Roos but neither have crowed - maybe I just want them to be hens so I don’t want to believe they are roosters? Lol they are 21 weeks old so just about 5 months old. All our other chickens I can so easily tell. Any help would be appreciated

 

[Tookie]

Both look like cockerels to me.