Hi! Maggiegirl here a newbie from Long Island, NY. My coop is almost ready! Coop itself is 6 x 6 with an attached covered run of 6 x 8, the coop is raised off the ground so the actual run size is 6 x 14 if we include the space under the coop. The run is 8 feet tall and will have a full door to access. I have 7 adorable baby chicks that are 4 weeks old and growing like weeds! I am trying to follow all the advice on size, ventilation, 1/2 x 1/2 hardware cloth etc. I wanted to use construction sand in the run and large pine shavings in the actual coop, or possibly straw in the coop. I would love to hear from people that actually use sand in the run and their thoughts. Also how old do the chicks have to be (I've read a few different ages) and what does the temperature have to be before I can move my chicks into their new home? Sorry if I posted this in the wrong spot. Any advice would be much appreciated!!!