The vet thinks it's cancer, not canker. They offered to do more tests but wanted $1000. Which is absolutely insane to me. I will definitely look into it, because I'm curious myself. I feel like if it is canker, her coop mates would be showing signs by this point since it's contagious through spit and they shared water containers. Unless it has a longer incubation period? I don't know. I should learn how to euthanize a chicken properly just in case I ever have to deal with a sick one again. Which, I have 20, so the possibility is there. I just hate it. You'd think I'd be used to it with having animals over the years and it feels like it's getting harder.