I have 21 little chicks that are now 2 weeks old. This is also my first time raising chicks and I was wondering what I need to have on hand in case of any kind of sickness. They are all doing great and seem as healthy as can be, but I hear of so many different kinds of sickness on here (cocci, etc.) and thought I may be suppose to have some kind of meds on hand just in case. They have been on medicated feed and 2 teaspoons of ACV/quart of water since they were 3 days old. Should I be giving them anything else?