ear fungus

Hi everyone, this is my first post on here so please let me know if I’m leaving anything out. I live in Scotland, I got 2 female guinea pigs from my local pet shop about 11 days ago. They said they were both around 9-10 weeks when I got them, although they do not look like they are from the same...

i was feeding my guineas like normal, you know the regular routine, I noticed something on Chocco’s ear, it doesn’t make sense he seemed totally fine. What could it be and what couldve caused it? Should I seperate him from his cage mate? and is it a fungus or infection?

I just got 2 piggies a week ago from a pet store, I'm a new owner and I didn't know that you shouldn't buy piggies from stores, and now my piggie Ruby has a swollen, hard ear with dryness. I think it may be a fungus but I'm not sure. I have attached pictures of her ear after I applied some...