I have recently adopted two female piggies that have been doing really well until recently. I've been looking at the info provided on the main site for help and advice, and was thinking about joining the forums. Unfortunately, I have ended up having to introduce myself at a not so good time.
Mayahuel and Oxomo are my guineas. Below is a picture of what they look like normally. I assume they're both younger (typical pet store age?). Mayahuel had a slightly irritated looking eye about a week after coming home, but I figured she may have just bumped it against some hay, and it cleared up after a day or two. When I was checking on her today however, I noticed that she is now missing some fur on the opposite side of here face.

Here is a picture of what is going on with Mayahuel's face.

I've done a bit of digging around on the internet and I think the best candidate is probably a fungal infection. I wanted to get opinions from you guys in case there may be details that I am missing. Oxomo seems to not have anything on her at all, but I will be checking on both of them frequently. Neither appear to be suffering from a loss of appetite, nor are they acting aggressive to each other. I've got them bedded on fleece, and they have access to pellet food, papaya treats, and timothy hay, as well as a water dish that I make sure to clean frequently.
Thank you all in advance for any help or advice. I just got these girls, but I want to take as good care of them as possible. Should I separate them, and if so, what is the best way to do this? i just have one