Smudge got a URI, she was snuffling now and then, so I took them to the Vet for a check up, they have a small animal specialist and he liked seeing the piggies, he said they all looked very good but smudge did have a wee sniffle, so got antibiotics to add to her water, been 6 days and she is much better now :-).
I changed the Timothy hay from pets at home to alfalfa stuff from a diff company, it's green and smells great and it's softer, however putting truffle away tonight I noticed one of her eyes was half closed and had a bit of crusty ness, a tiny bit but drew my attention. She is still running about and eating and drinking, including the antibiotics water as vet said they can all have it. I think she may have hurt her eye with the stiff hay or when they run about. I will keep an eye on it tomorrow and if it doesn't improve I will take her to vet on Monday.
Hopefully it's just a scratch type thing.