Buying and hatching eggs naturally

[jscrouchet]

I have a great sitter she is a silver phoenix but I would like to get some Americana eggs for her to hatch. I was just wondering about the shipment of the eggs do they need the heat packs, do i have to let them rest before I give them to the chicken to sit on, medicated food, etc. I got chicks last year from the local farm store and they all did great but since I have a sitter I wanted to try and hatch some on our own. If there is someone that could give me any information on the process it would be greatly appreciated.