My 3 year old sex link hen was previously said to have egg yolk peritonitis and has lost almost all her body weight. Yesterday I found mites on her and dusted her and the coop and the mites are gone. Now I find her underneath the food and water hiding from the other hens. So I isolated her in a kennel and now she is acting like she is about to die. Is there a way to humanely put her down without going to a vet? I thought she was going to die 3 months ago and she's still hanging on but not doing good.