Hi, I have nine 10 day old chicks. They are of different breeds some being bantom. They have been on nutridrench in their water since day 2 and non-medicated feed (crumbles). Meant to get medicated just noticed it is not. I have 4 hens total and the chicks are seperated right now with the mother hen. I have to walk through the run where the adults are to get to the chicks so they are exposed to any issues the adults may have. (All, hens and chicks, seem healthy and are eating/drinking acting normally). My questions are : Should I switch to medicated feed and how long do the chicks need to be on nutridrench? Also the chicks are bedded on hay with the mother. Do I need to add grit? I don't know if they consume the hay but I suppose its possible. I've read about playsand, construction sand and parakeet grit. Any body have any info or thoughts on that? Thanks for your time!