I have 6 chicks I got from Tractor supply 4 days ago. I also have 6 hens I got from tractor supply as chicks 1 year ago. The chicks are in a brooder in the garage. The hens, well right now they are in the horse pasture (they free range all day). What kind of measures do I need to take to keep one set from possibly making the other set ill? I have been hand sanitizing before and after working with the chicks, and the hens are banned from the garage. Do I need to bleach my shoes when moving from one area, the yard, into the garage and visa versa? Are drastic steps necessary, or just common sense. I assume that by the time the chicks are ready to step up to a run and coop I will have seen any symptoms of illness and can let them see each other through the fence. Just call me paranoid.