I'm so glad that some of your chicks made it. I have seen chicks at farm stores suffering these same symptoms, since they are shipped in the mail also. When ordering chicks I prefer to get them from the closest hatchery, or even drive to one to pick up the chicks. It seems that the months...
Here are some articles to help you deal with shipping stress:
http://www.upc-online.org/transport/71408shippingbirds.html
https://www.backyardchickens.com/t/746509/how-to-deal-with-travel-stress-in-baby-chicks
http://farwesthatchery.homestead.com/MainPage_Content/Chick_Care/Chick_Care.html
This sounds like shipping stress. If you can get SaveAChick vitamins/electrolytes and mix them in the water--then start dipping their beaks in the water, while also giving them time to swallow each drink. Keep doing this all day. If you don't have electrolytes, you can use sugar water or this...