I am really sorry to hear about your chicks.
We recommend sugar water for the first few days (no electrolytes) and a good chick starter for our shipped chicks. About a tablespoon in the little quart waterer. After the first couple days if you end up with a weak chick you can give them sugar water in a little eye dropper to boost their energy again (table sugar). The ground up oatmeal is a good idea as well if they are eating. (We provide all our chicks with grogel but it is usually not available locally and would need to be ordered.)
It is very common to get pasty butts with shipped chicks. It is basically caused from their stressfull trip. Yes, they can die from being blocked with the dried poo. Very important to keep butts clean, they will get over it in a couple days to a week. generally.
Good luck with your remaining chicks!
Nellie
TheFancyChick.com

It is very common to get pasty butts with shipped chicks. It is basically caused from their stressfull trip. Yes, they can die from being blocked with the dried poo. Very important to keep butts clean, they will get over it in a couple days to a week. generally.
Good luck with your remaining chicks!
Nellie
TheFancyChick.com