I will be getting four 10 week old wyandotte pullets tomorrow evening and this is my first time adding to an existing flock. I currently have two 12 week old pullets. My questions are: A.) What should I be looking for while the new girls are quarentined? Please list any "bad" signs. B.) How long until I know they are not sick? C.) These girls were fed medicated feed, does that completely cut out the chance of coccidia? (sorry if this is stupid question) D.) Should I take any special care of the new girls waterer/feeder? Such as disinfecting occasionally and such? Thanks all for any tips. I am confident this will go well, and am happy to be adding chicks that are only 2 weeks difference in age so that I won't have too many integrating concerns.