Hey everyone! I'm getting some Marek's vaccine delivered today to administer to our 5-7 day old orpingtons. I've read that as long as they have been inside and kept away from other chickens, it is still okay to vaccinate. I hope this is correct. I've read all the instructions/links from other posts and feel like I can probably handle it, but wanted to know if anyone might have any last minute recommendations/advice to a first-timer. We have 10 chicks to vaccinate. Thanks in advance!