Hen or Roo, Final Colors?

[JerseyChickens154]

Hi there! I have three chicks that are about 30 days old they were sold to me as Easter Egger leghorn mixes. The gray and the yellow chicks have small single combs and the brown chick has a wider flat comb--I was wondering if anyone could tell if they are gals or guys and also has anyone else had experience with leghorn/EE mixes? Do they have increased egg production? Also curious what their final coloring will be if anyone had similar looking chicks. Thanks for your help! (photos are today at 30 days and also the first day)

 

[igorsMistress]

Awe, such cute little babies! It's a bit early to yell gender yet but you've got a white and a blue, the third looks to be primarily black there?