So I dont own any chickens and my husband and I are planing to get land soon. It will be either near phoenix az or where we currently live in iowa. I was thinking of getting silkies, polish , and a few americana chickens. Are these good choices for a first timer. i have been around chickens and raised geese and other birds. How do these guys do in the heat? cold? can you mix them together. Any idea would be very helpful.