DD has a guinea pig and she is the cutest little thing. She is probably about 5 months old. We have had her for about 3 months or so. She is still skittish at times but doesn't seem to mind being held, esp. by DD.
Miss Piggy makes kind of like a purring noise when she is petted. We kind of hope that means she likes being petted and getting her back scratched. We have looked for books on guinea pigs but haven't found any with much info.
DD keeps hay in her cage for her. And gives her a piece of romaine lettuce every day (her favorite). She is not much on carrots or other fruits/veggies, even though the books we read said they love them. We also keep chew blocks for her to chew one in her cage. DD also has a playpen type thing she puts in the floor for Miss Piggy to run and exercise in.
If you have any stories or advice, I would love to hear it. We are hoping Miss Piggy will have a happy home with us for many years.