Hi sadly we lost 2 of my chickens recently and we still have 2 but thought it would be nice to get 2 more. The chickens I do have come from a egg farm so not sure how old. But this time I would like to get some chickens that are younger maybe just before they start to lay. Is there any tricks to the introduction. I have Hi Line chickens at present. Love some advice. Hope you are having a lovely day.