My chicken started moving with difficulty. Thought it was old age. From yesterday she just sits, not eating. Checked her and seems like shes full of tiny long insects in her feathers. Dusted with Karbadust carbaryl. I give her water. She drinks but looks dying. I feel so bad for allowing this to happen!
Welcome To BYC
Do you have any photos?
How old is your hen?
Does she still lay eggs - when was the last time she laid an egg?
Do you feel any swelling, bloat and fluid in her abdomen?
How does her crop feel - is it emptying?
Has she been wormed?
Dusting her for the lice/mites that you see is a good idea. Personally I would not give her a full out bath since she is weak and sick.
In older hens, internal laying/reproductive disorders like Egg Yolk Peritontis, Ascites, Salpingitis, cancer or tumors can be a common cause of lethargy, loss of mobility (limping/not using the legs), going off feed and weight loss, to name a few symptoms. Illness due to reproductive disorders usually are not responsive to antibiotic treatment, but you can try, most of the time supportive care is best.
IF she has any swelling of the abdomen, you can soak her lower half (abdomen) in a warm epsom salts bath, to see if this gives her any relief. Dry her well and keep her warm.
Keep her hydrated, add some poultry vitamins to her water. See if she will eat her normal food with some chopped egg or tuna mixed in (you can offer the food wet).
Let us know how she is doing.
