I'm a first time chicken owner. I have a small brand new chicken tractor and want to make sure I pick the perfect birds. I want them to be friendly and good layer. I'm thinking about sex links and really like the black sex link. I want 3 females. Should I get a black, buff and red sex or should I stick with one type? Is the sex link a good beginner bird? Please help, would love to have input from knowledgeable chicken lovers. Thanks so much for this forum so I can learn the best way to take care of my ladies and have a happy coop!