Wow, I didn't even see this. Well, it's old, but I shall respond anyways.

I treated them with Flagyl first(It takes more than one treatment to get rid of this bug). After treating them with the Flagyl, I lost one more chin. I took them to another vet and he prescribed Panacur, and sure enough, that cleared them of it! I just hope that I never have this again. I think they picked it up from the chinchilla show.