I have 5 ISA blacks, 10 ISA browns, and 2 white roosters, not sure what kind...leghorn I think. But I also have an incubator, so I hatched 15 in one batch and 22 from the next batch. I guess they would be ISA Leghorn cross? What is a "mutt" chicken called? Lol! I also have 3 royal palm turkeys and one blue buff coloured, forget the name of the breed! I love my birds!