Sorry for your loss. It may be hard to know the exact cause of death without a necropsy. I would examine the feed to make sure it is not moldy. If you lose another, contact your state vet lab early in the morning M-F, and take or ship the body in by Fedex overnight. Keep the body cold, not...
I would look inside her beak and at the tongue for any injuries. Is her beak cracked or injured? Has she been sneezing, coughing, or gasping? Pictures would be helpful.
Sorry for your loss. What symptoms are you seeing in the ones that have died? Have you had any illnesses in the past? The crop of the chicken in the picture looks to be very full, but a leaking air sac in the chest should be rules out. Do the roosters fight or challenge each other? Check for...
Can you post any pictures of her missing feathers and her face/eye? Do you see any bubbles or foam in the eye, or drainage from the nostril? Can you separate her inside the coop within a wire dog crate, so that she remains used to the outside temps? Have you seen any of the one piece hen saddles...
While on the Flubenvet, she should probably just eat that so that she gets the correct dosage of medication. Can you get a picture of her legs from the front to see if there is a bone deformity? Does one leg seem weaker than the other? Is Mareks common in your area? If you can get some...
She might have been squeezed and has some internal injuries or is dehydrated. Do you have any Poultry NutriDrench or electrolytes, Gatorade, etc to offer her? Try some bits of scrambled egg and a small amount of watery chicken feed. I would probably leave the wing alone unless she is tripping...
Welcome to BYC and sorry about the sick chickens. Check for any moisture that could have made feed moldy. Mold can cause serious illness. Check a few crops in early morning when crops should be empty. Are any tails lowered or upright? Offer some moistened fresh chicken feed and some scrambled...
Usually if you refrigerate the body in 2 plastic bags or keep the body cold not frozen in a cooler, you can transport the bodies M-F to the labs, or ship them overnight via Fedex. Some labs will email a shipping label for that. It is always less to take them in person. I and others do home...
When they get stuck like that they can fight and try to get out injuring themselves. Can you post any pictures of her leg? Be careful with splinting so her circulation is not interrupted since tissue can die if splints or tape are too tight. Sometimes it is better to leave splints off for a day...
If you can keep the body cold in a refrigerator wrapped in a plastic bag until Monday am, you contact the state vet for a necropsy. That is the beat way to determine what causes the death. Sorry for your loss. Here is a list for your state vet:
https://www.metzerfarms.com/poultry-labs.html
Very sorry for your loss. If you still have her body available and could keep it refrigerated until Monday, you could have your state vet lab do a necropsy and test for what she may have had. What state are you in? Here is a list of stae vet labs to contact on Monday morning if you wish to get a...
If they sneeze at other times and repeatedly when not eating, that can be a sign of a virus called infectious bronchitis. Hopefully, dust in the feed is causing the sneezing temporarily.