I've been feeding my chicks medicated starter/grower from day one. They range in age from 5 to 8 weeks old. They're all healthy and thriving but I have seen posts on here where people stop feeding medicated starter/grower. My question is....is there a best practice? Can I give them the medicated up until I switch them over to layer feed? Is there a benefit to stop feeding the medicated and start giving them the non-medicated starter/grower? Are they still highly susceptible to cocci?