Infection Is it normal or infection?

Has she always had it? It's probably normal. I have a black pig who has pink feet with white fur on them, and the nails are pink/black mixed, as well as the feet. Those appear to be pretty healthy feet. If she shows any pain to you touching the feet, I would take her in to a vet, but it looks good.

On the other hand, the foot being of different size of the others sounds a bit odd. I don't know too much about that, however. Contacting a good Cavy-Savvy vet would be your best option.

Looks normal. She needs her nails trimmed though.

Infection usually has redness, swelling, and heat. Sometimes odor, depending on how bad the infection is and where in the body it is.

Thank you all, I just got off craiglist few days ago, so I don't know how long has she had it but I think she's fine. She doesn't show any pain