My 3 year old Cochin X Ameracauna banty hen has stopped laying, and hasn't left the hen house for about 2 weeks now. She eats very little, some apple. Her comb and wattle is very pale and she is lethargic. Just sits there puffed up with eyes closed. I have tried Piperizine and fenbendazole, also had her on Tetracycline/Neomycin and also a Penicillin/Streptomycin. Nothing seems to help her, she is just wasting away. She has no respiratory symptoms. I have heard of using Ivermectin for worming? Should I try this? Can I use the horse dewormer and if so how much? Should I feed her thru a syringe to keep her strong? What should I give her? yogurt? honey? apple sauce? Any advice would be appreciated. I feel her time is running out 