Never pleasant, having to end life, even in their own best interest -- there's almost always somebody nearby that has done this before, and would do this on your behalf, so as to spare you from having to perform this kindness (most especially to any creature that's close to you )-;~I am not in any way implying that you should cull her. Just wanted to share an unwanted experience I had to deal with that may help you IF it comes to ending her suffering. I had a hen that was really suffering and I felt I needed to end her suffering. I had nursed her for 3 days....spent $50.00 on supplies to nurse her. Only to do what I knew needed to be done. I had never killed a chicken before (I did have to end 2 chicks to stop their suffering but it is different when the chicken is full size and you have had her for a while) Anyway, I made the decision and got out my big tree branch loppers made sure they were good and sharp. In the dark took her out behind the shed. I had the house light on so some light was getting out there so I could see, but not alot. In the dark chickens are pretty relaxed and unaware.....It helped her and I that it was dark. I said a prayer to take my pet quickly , put my foot gently over her on the ground to hold her in the same place. Opened the loppers and placed them around her neck....said another prayer and clamped them as quickly and hard as I could. She flapped a bit and then fell silent. She went pretty quick. It was not easy but it was in her best intrest and mine. In the end, the way I cared for her most was to end her suffering. Again I am not saying this should be your decision. Listen to your gut feeling. If it is saying she is improving and you are hopeful, continue within reason. If your gut is saying you are getting no where and she is suffering make the decision and do it.
In no way do I wish to reduce such an emotional experience to a scientific explanation, but wish to offer one that may help folks understand that the only pain suffered is their own ...
Nervous systems have two main parts, one which controls voluntary actions (based upon intentional actions), and one which carries out the involuntary functions (the autonomic responses). Although wing-flapping and leg movement is generally controlled by the brain, the continuation of movement is clearly autonomic, as there is obviously no further communication between the brain and the muscles.
The nervous system is divided into two main parts which are the central nervous system (CNS) and the autonomic nervous system (ANS). The CNS is responsible for the voluntary actions of the body such as movement of flight, and the ANS is responsible for the coordination of involuntary actions of the organs, intestines, blood vessels and glands. The primary function of the nervous system is to integrate the functions of the body.
Electrical stunning, using a water bath stunner, is the most common method employed to slaughter poultry under commercial conditions. The purpose of electrical stunning is to induce insensibility in order to perform humane neck cutting and to avoid recovery of consciousness and wing flapping during bleeding. The basic principle involved in electrical stunning is that an electrical current is passed through the brain to induce epilepsy. The occurrence of grand mal epilepsy is considered to be an indicator of the state of unconsciousness (based on the human analogy).
Controlled Atmosphere Killing (CAK) is an alternative method for slaughtering poultry. It involves placing the chickens in a container in which the atmosphere lacks oxygen and is made up of argon and/or nitrogen and/or CO2. The result is that the chickens loose consciousness. Argon and nitrogen are important components of a painless gassing process as using CO2 seems to cause distress. The respiratory system has CO2 detectors and high levels of CO2 will rest in a fighting response in chickens – typically wing flapping – which can result in increased wing damage. There are no such receptors for argon or nitrogen.