Any problems giving the medicated feed too long?
A lot of folks never feed medicated at all. Some feed medicated (amprolium) for 6-8 weeks and then are done with it. That's my preference. None or just for the first bit of time.
While the feed companies say it's fine and harmless to any bird and to eggs, I see no reason to use any more of it than necessary.
Your question seems to indicate that you may equate Stater with medicated? Starter often comes with or without amprolium.