I'm thinking all three BRs are girls.... BUT I had a BR that everyone thought was a lady who ended up being a roo, all you can do for now is watch to see if skinny hackles and saddle feathers start growing, keep an eye on Britannia she might end up being a he. But I am leaning towards three ladies, and as you've figured out already EEs are boys. The Light Brahma could go either way but I am leaning girl. Keep us posted!