My chicks just arrived in the mail, and all seemed ok, drank their first sips of water, etc. Then in a couple of hours, two of them were eating and drinking and running around like crazy. The other is still frail. Keeps opening her mouth like she is trying to get air or has hiccups (don't really know how to describe it). I've been giving her water with electrolytes (which is what the others are drinking) from an eye dropper and some chick feed softened with water from an eye dropper, but it doesn't seem to be helping. Any other recommendations to try? Any advice would be appreciated.