HI yall! I just bought my first flock of chickens. I have 6 Barred Rocks, 6 Rhode Islands Reds, 2 little things (not sure of their breed), 2 Silkies, and 2 Easter Eggers which leaves me with a total of 18 chickens not sure how I got that many but they are so much fun! My problem is, I bought them from our local farm store and I talked to their "chicken expert" and he told me that all of them were vaccinated at the hatchery blah blah blah.. I went back to pick up my Silkies and Easter Eggers and one worker said they were vaccinated, another said they weren't and yet another said they weren't sure because she thought they came from different hatcheries.. I've read sooo many posts on here and finally decided to post my question(s) and see what I can get answered. SO here they are: How important are vaccinations? Should I contact all of the places and ask if they indeed have vaccinated the chicks? This would require alot of work to figure out which chicks came from where but I'm totally willing to do it if it's important. My BR's and RIR's are already 6-7 weeks old, if they aren't vaccinated can I still vaccinate them? The other six are only about a week and a half. My second big question is how long do I keep them on the medicated food? The guy that sold them to at the farm store told me they had to be on the food until they are six weeks old. Is that correct? Or am I doing everything wrong? I would really appreciate any and every piece of advice I can get. I know all of the chicken experts on this site can throw their two cents in to help out a poorly educated chicken owner!