chicken looks extremely sick

[flindersa]

one of my backyard chickens (not sure what breed just brown normal looking chickens)
has become extremely sick, there was blood on the outside of an egg, it isn't eating anything, it waddles around with its eyes closed, its face and crown has become discoloured and the crown no longer stands up. it also looks very bloated

it appears to to be in a lot of pain and i am wondering if the best thing to do is to put it out of its misery, if so what would be the most humane way of doing so

 

[Free Feather]

Take her to the vet! If it is something contagious you want to find out what it is as soon as possible. If she does end up dying, and you do not figure out what she died from, you should send her in to a university for an autopsy. This may sound like a lot of hassle, but it is better than risking your entire flock.

 

[Eggcessive]

Welcome to BYC. While a slight blood smear may not be too uncommon in new layers, with the symptoms you describe, it could be something more serious such as oviduct cancer. Bloating sounds like internal laying or cancer. Bleeding can also occur from coccidiosis or from capillary worms. I would take a rubber glove with lubricant and do a digital exam of her vent about 1-2 inches inside to feel for an egg or abnormal tissue in there. A vet could run a fecal test on an early morning fresh dropping to look for capillary worms. Valbazen (albendazole) will treat capillary worms.