I have 3 chicks coming to me in a day, arriving to my local Co-Op from McMurrays and they will be vaxxed. And then I will be bringing 9 more to my flock in early April. These latter will be locally raised, and won't be vaccinated at all. They will be from a small farm...I plan to keep a small flock, these will be my only layer hens ( yeah right!!! ) Will I encounter problems by having the mix? I am planning on raising them organically, and won't be using meds or medicated feed (against cocci's) Anyone have experience with a small flock of mixed vaxed and non-vaxed? Thanks!!