No problem. It wasn't the feed, whether medicated or not, at least in my case as I almost wished I'd had medicated which I always use, but was out, so for the first time just started them on regular, and then have my first issue. Go figure lol.
I had exactly this problem. About 3 months ago I purchased 4 fancy silkies from a breeder. I've raised 100s of silkies I've hatched on medicated but ran out, so these ones got regular Kalmbach's grower. One almost immediately started doing that same thing as a three-day-old chick. Plus...