Sounds like you did everything right. It sounds like some kind of shipping stress, but I don't understand that liquid out of the mouth. How long was it from when they shipped until you got them?
I'd certainly get back with Cackle. It is unlikely it was anything they did but they need that information in case they do have a problem. A few years back a different hatchery had a disease problem which they quickly corrected, but they can't fix it if they don't know about it. I expect Cackle to try to make it up to you. They just wanted you to wait until you had a final count. They have been very good when I dealt with them, although they were hard to get through to on the phone. That's been a year so maybe they finally fixed that.