Neighbor has a chicken that is dying. Don't know what from, need to know if there is anything we can do to help it or if we should just cull it. Approximately 21 days ago i went over and noticed this hen squat, walking slow, and looked like she was dragging her bottom. Tail feathers were untidy and vent wasn't that clean, i looked it over and there were no open wounds, but mites and she was skinny with a noticeable breast bone. I wormed her and 7-dusted her as a double dose for the mites and any possible internal parasites. There is a slight possibility of internal damage from a dog but i can't feel any broke bones so it would have to be soft tissue. No blood in stool. Apparently lately the hen has gotten where she can't/won't stand to eat or drink or pass bodily fluids. Her breast bone has become even more prominent and color has slowly depleted from her face/comb. When you pick her up and place her in front of the water she will drink, i haven't been over there long enough to watch her eat though. Any clue as to what this might be to possibly treat it or keep it from spreading to the rest of her or even my flock? The bird is in "quarantine" at the moment.