I am about to go get some new hens for my flock, I have 8 hens( mix of 3 silkies, one barred rock, 2 type of reds and one black, and one leghorn) They all are almost 5 months old so none of course are laying. The ones I am getting are young still but are laying good the person said I am only getting a few more! Thats the plan anyways My question is do I need to put them in a new coop? I have heard you can't put them with your flock for like a month or something because of different flock dieases???? I have another coop I could use, but for the day I always let mine free range and would want these hens to do the same. So I am sure they will run into each other, leaving me to probably be picking chickens out or each different coop every night Also since they are older will they fight? I only have one rooster hes only 5 months also.