Homemade electrolyte recipe is- 1/2 teaspoon each salt and baking soda, 2 tablespoons brown sugar, 2 cups warm water. Mix well, serve full strength. White sugar can be substituted. And if you have it add a few drops of Poly Vi Sol baby vitamins with NO iron. The b's help a lot.
Times I've been sick was too tired to care about eating or drinking. Putting a few drops on the beak every half hour may give enough strength to eat. On my shipped chicks, usually within moments of them getting the mix they throw off some happy peeps. Have had them do that and pass right after as well though. But I know I did what I could.
Sometimes I do a boiled, smashed egg watered down with the electrolyte solution or by itself even. Most chicks love it and it's loaded with easy to digest micro nutrients.