I'm new to raising chickens but it's something I have always wanted to do. We bought ours from a hatchery. I've seen some chicks on CL that I'd love to have! Everywhere I price them online is more than we can pay. The add on CL has been there repeatedly for months. My question is how do I make sure the chicks from the ad are healthy? We did have one hatchery chick die. I worry about bringing in illnesses from other sources.