My chicken is ill. She is weak and lethargic and only had one eye open. Her faeces are yellow and runny and clear discharge is coming from her mouth. Her comb has turned a lighter colour and she seems like she cannot support her own weight. She seems depressed. One of my other chickens showed the same symptoms 3 days ago but whatever it was passed yesterday however it is more severe with this one. I am unable to take her to the vet. I suspected Blackhead but her comb has gone lighter, not darker. Please help, she means a lot to me.