Well .... there are pros and cons I would expect. If its antibacterial food, then it will kill beneficial bacteria as well as problematic bacteria - so that might not be very useful. On the other hand, I do not have any other birds - none in the house or pets outside, other than wild birds flitting about. Our chicks - which we hope to get in January, will spent their first month inside the house in a large dog crate brooder - we have one dog and two cats who are pretty healthy - save for my dog's allergies - which is not contagious.
Medicated feed contains Amprolium, a coccidostat. It is a thiamine blocker. This medicated feed only works to kill off coccidia, responsible for coccidiosis in young poultry. It does not kill any bacteria or other issues in poultry.
As babies grow, their bodies learn to handle this protazoa and gain immunity. Either they grow this immunity in the brooder on regular feed or after the babies are removed from this feed at 6 weeks.