Hi Nichole-
ChrystalGail is talking about Pratt's Pets which is on Glendale at about 53rd ave. They always have chicks, usually 5-7 sexed varieties and straight run bantams. I have Ameraucanas, a Rhode Island Red and an Andalusian which I got from Pratts and they all seem to be doing well. My neighbor has some Orpingtons and various white varieties. They all seem to be doing fine (this is my first year, his second with chickens). You just need to make sure that their coop/run/tractor is in full shade in the summer. I've put plywood on the top of mine and shade cloth on the side which helps, but they much prefer to free range and hide underneath bushes, especially after they've been watered and the ground is damp.
I think if you get them now, they'll be feathered out enough by the time it starts getting cold. Have fun with your chickens!