That really stinks about having chicks delivered that way. A few hours could have made a difference. And if that wasn't traumatizing enough, you probably weren't able to get a refund due to the were delivered "alive".
Are the shipping boxes clearly marked? Wondering if they get tossed around like everything else.
When I took my dogs in to the vet for nail trims the other day, I asked the girls if they treat squirrels. I was told Nooooooo - why do you have one? It's illegal for them to treat any wild animals. I figured that after looking it up online. Missouri's stance on wild animal babies is to leave them where they are as it's all part of the natural process. There are only a few licensed wildlife rehab's in the state and they likely wouldn't take a squirrel.
If the need ever arises again I would still do it.