Hello! A front view of the first one may be helpful, it looks like a blue-faced mutation. The male blue faces have a bluish color on their breast, and the females have no hint of blue, they are just brownish. The second looks like a golden pearl mutation, at this point it definately looks like a female because the males develop a black and white beard on ther chin. The third looks like a red breast mutation, also definately a female. With the fourth it looks like a tuxedo and I can't be sure, but if there are reddish brown feathers around its vent, it would be a male. With the fifth and sixth, they are white which cannot easily be sexed, but you will know if they lay eggs!