I first noticed about 2 weeks ago my hen had like saliva hanging from her beak. I thought it was strange but after the 3rd day I started to worry so I was just inspecting her and happened to see inside her mouth and saw a yellow lump. At first I just thought it was food but the following day it was still there and so I started to do research online and apparently it’s canker. I bought metroplex on Amazon I believe it has metronidazole. It came in a powdered for so I’ve been given her 250mg once a day, today was the 5th day and I saw it can be give 5-7 days. I looked inside her mouth and it still looks the same. She is still eating normally but has a hard time swallowing b/c of the mucus/saliva. My question is, is the yellow lump going to fall off eventually or how does that work? Do I need to wait a while and do another round of medication? I try to change her water often and add apple cider vinegar and some thyme leaves.