I was in a pet shop the other day buying Lola some hay, and couldn't resist peeking at the animals there (yes, i know you all don't like guinea pigs at pet shops, though i must admit it was where i got Lola). We noticed there was some peanut butter on the edge of the guinea pig's food dishes. Then we noticed it was in with the hamsters and things, too. Why would they do that? Is peanut butter good for guinea pigs? Is it some sort of a treat or something? Just wondering...