2 Day old chicks is a great way to start. You will need to keep them warm until they are fully feathered.
By raising chicks this age, they will grow accustomed to you, and your
land.
Chickens are rather simple minded critters, and fairly low on the food web. Therefore, they are easily stressed by
changes. Adult birds who are moved to a new location can become very nervous, especially of the previous owner was not their best friend. The young chicks aren't old
enough yet to be as traumatized by the move, and once they recognize you as the provider of their food, they will quickly learn to trust you. Older birds may never trust a new owner.
Happy birds stay much healthier than stressed birds throughout their lives. Stressed birds create more acidity in their stomachs, which allows gram positive germs to multiply rapidly, thereby making them more prone to disease. Keep your birds happy.