I would just watch her for a while. Are the other two chirping like crazy? If she's chirping a lot, that usually means she needs something, but I can't tell you what to do next.
I had worse luck with my most recent shipment from Ideal. The first time I ordered from them, last October, I ordered 10 bantam cochins, and they stuck in 15 males for warmth. One packing peanut died in shipping, and the rest survived to maturity. This time I ordered standard fowl, and had one die during shipping, and 4 more over the next 3 days. I think the weather has been bad and they had a rough trip. These things just happen, and it's hard to deal with.
I hope your baby pulls through. Keep us updated!