Any help on identification of these chicks?

[TSaunders]

Sorry I am new here but have become obsessed with this forum! Can you help me identify the following chicks. I am pretty sure the one group are Leghorns but the smaller mottled brown ones I have no idea! Thanks. Do I assume that the Leghorns? with the large combs are the males?

 

[critterwhisper]

Awww they are cute! Besides the leghorns the other batch is a mystery to me,but they are pretty. I am sure someone on here can help ya out

 

[Lolipop]

Gold sex link?