For some background I currently have 1 frizzle, 3 BO, and 2 Australorp. They are now a year old. I ordered them from Mcmurray and had them vaccinated for Mareks and Cocci. I would like to add some variety this spring. My options are: McMurray-carries SS, SF, EE, and Barred Rocks. I can get the vaccination for Marecks and Cocci. I have to order 25 minimum and I only want about 10 more chicks. or Ideal- carries SS, SF, EE, and Barred Cochins. I can get the vaccinations for Marecks but not for Cocci. I would be able to pick them up in person so no minimum order. I really want to go with Ideal but I'm not sure about the vaccination part. Since my original flock was vaccinated do all birds that I bring in have to be vaccinated? I'm not sure if there is a time limit to the vaccination. Anyone got any opinions? Thanks!