Greetings. I need help! This is my first attempt raising chickens,building coop and run. I have a few questions. We want to start building our coop and run this weekend. Our funds are (very) limited so keeping cost down Is a must.;-) Is there particular types of wood that should be used to withstand the elements? How wide should perches be? Are any building materials toxic to chickens? What type of metal protectant screening should we use? OK let's say we have the finished coop and run; What's next? Are we supposed to spread anything on coop floor? What about the nesting box, do we put hay (like they show in the cartoons lol:-D)? Also, our chicks are 4 weeks, our 7year old son talked us in to getting a couple of silkies that we pick up tomorrow. Im sure they're hatchlings. Are we supposed to keep them separated? Will the older ones attack/kill the newbies?Or how does that work?