Anyway, I was wondering about the effectiveness of antibiotic/antifungal ointment for such a little pig. So long as I'm being very sparing with the application, should it still be ok on her little digestive system? Or are there better alternative treatments I could look into?
Guinea pigs are very prone to fungal infections, but happily, most resolve with good diet, hygiene and a little TLC.
And for my own future reference, so I don't forget- her (and her sister's) DOB is 10/6.
 Also, thank you all for the help! And sure, it's ok to add the pic permanently :)
There's no itchiness so I don't suspect mites (if anything I would assume more fungus given the stuff on her mouth) but I know ivermectin is often suggested as a "just in case" treatment anyway. She ought to be big enough for that in a week or so. I just hate to not do anything and prefer to nip things in the bud when I can... Thoughts?