Our daughter has a kitten named Sophie, and well Sophie gets lonely sometimes I guess. Whenever she gets the chance she climbs into our guinea pig cage and hangs out with them. They don't seem to mind, and I have even caught one of them grooming Sophie before.
She has been going through a growth spurt lately, so I am not sure how much longer she will be able to squeeze into the cage. When she starts acting like the guinea pigs look more like "food" rather then "friends" I will put a stop to her climbing into the cage. For the meantime though, I couldn't resist taking some pictures of this strange attraction between the cavi and the cat.