Medicated chick crumb.

if the chick crumb says ACS on it then it is medicated - farmgate sell both types the non medicated seems to be a lot more money  .
I never use medicated as it only helps to prevent some types of cocci so I feed non medicated and have a bottle of coccoid on hand just in case (if you do get cocci then you need to feed a non medicated feed and treat with coccoid or baycox). Plus there is no problem if any of the egg laying girls get to eat the non medicated feed.