I used simply non-medicated chick starter and water. The medication in the medicated will be diluted if you ferment it so it is rather pointless to use it. If it happens to be the only chick starter you have access to, then go ahead and use it.
http://tikktok.wordpress.com/2014/04/13/fermented-feed-faq/
If that's all you have available, it won't hurt. But it's not necessary.
{And it's in the FAQ linked above. }
I don't use medicated feed dry or FF.
It's not really 'better for the chicks'. It is a thiamine blocker and only works to starve the protozoa coccidia. If managed properly, it's unnecessary. FF tends to increase B vitamins so it may be counter productive.
Thanks for the info