Very sorry for your loss. If you keep the body cold, but not frozen, you could send it off to the state vet for a necropsy to look for a cause of death. Here is a list of state vets:
https://www.metzerfarms.com/poultry-labs.html
Yes, SaveAChick electrolytes with vitamins is fine. With a doughy crop, you can offer some small pieces of chilled coconut oil cut into peckable pieces, up to a tsp daily. Then massage her crop several times a day to try and break up any doughy mass. Check it again in early morning before she...
Has she been wormed recently? Many of our FL members report having to worm more often in their area. Valbazen is very good, and Safeguard liquid goat wormer may be a little easier to find in your feed store. I can give dosages. I agree that water with sugar or electrolytes, or plain water after...