I got goldie about 3 weeks ago and a couple days ago discovered she has chicken canker (yellow build up and lesions in her mouth and around her beak) She has been an unhappy chicken from the day I got her so I suspect her immune system was already compromised before I got her. I have been giving her 250mg of metronidazole for 2 days now and no change at all and now it look like she has spread it to all my chickens. Has anyone here dealt with chicken canker and successfully handled it? Also any home remedies that will help boost the healing process? I have ACV in my chickens water, am giving them yogurt with probiotics, DE and garlic. Any other suggestions?