I have 3 female guinea pigs who all seem to be very healthy and all of a sudden yesterday one females eye looks a little watery. I waited a bit checked on her again and it was a small amount of gooky white dishcharge from only one eye. I wiped it out and examined her eye is all looks fine and i checked on her again that night she was fine. This afternoon she had a little bit again in the same eye. She seems fine acts normal no runny nose or anything. Is this normal or is there anything else i can check before i decide if i need to go to the vet or not?