I 2nd Lazy Gardener, I never given my chicks any meds when exposing to their new homes i.e. soil, flora, grass. Make sure that their getting proper nutrition to fight any diseases and build natural immunity. But its just me, reason I entered into this endeavor to avoid unnecessary medications...
Yup take it back, the last time I was in TSC was over 3yrs ago when they sold me chick starter that has molds in it, when I complained to a manager, they told me to call the feed company instead of replacing it. Needless to say I never set my feet in those store. I found an awesome...