Hello, I have 5 pullets 12 weeks old and am going to add 2 others that are 14 weeks old. My current 5 have never been vaccinated and have been on medicated start and grow since day 1. The 2 new pullets have had vaccinations including coccidiosis, so my assumption is that I should stop using medicated feed and go to non-medicated feed until the 5 are 18 weeks then all go to layer feed. Am I on the right track? Sorry, I am new at this so any advice is greatly appreciated.