I have two chicken, Kung Pao and Henrietta. They are little over 2 years old, free range never been wormed. Kung Pao has fallen ill. She is very weak and tired, dozing off, unable to get in her coop. Ive been placing her on her perch at night and taking her out in the morning. She's been drinking water and eating only after I place her in front of food and water. Im thinking she has a parasite or a bad case of worms but that's just a guess after reading some articles. They've been exposed to wild birds, compost, bugs of all sorts ect. Yesterday i put apple cider vinger in the water, I added cayenne pepper and garlic powder to the feed and put out plain yogart and some veggie soup. She seemed to like these things but its gonna take more then tlc, I think she's dying. After reading the articles I think I better worm both chickens but what should I buy for chickens who've never been wormed? Is it ok to give worm medicine to a sick chicken? Any other adivise might you have for me?