Lizzy our little hens death

[Lorenzo Shapiro]

We have had a rooster and hen for a few months. The other day the rooster was carried away by a hawk. then a week later our little hen was dead. Earlier in the week we purchased 2 new 2 year old hen and rooster from another farm. After the week is when we found our little original hen dead. any help would be appreciated. Attached is a photo of her underside and it appears her breastbone is visible thru the skin? We really dont know what were looking at?

 

[Eggcessive]

I am sorry for your loss. Are you in the US? Most state vets will perform a necropsy to look for a cause of death if you keep the body cold or refrigerated, and do not freeze. Could the older new hens have kept her from food and water? Here is a list of state vets to contact for a necropsy tomorrow morning:
https://www.metzerfarms.com/poultry-labs.html