It is a widespread misconception that rodents eat grain. Grain in the form of concentrated feed is only suitable as an occasional snack! The natural diet of guinea pigs is made up of grass and herbs so pets that are kept in cages should be given lots of fresh food.
Are you looking for an adaptable cat for domestic life, if possible with a long coat? Also commonly referred to as the Highlander, the British Longhair is the semi-longhaired alternative to the British Shorthair, sharing its friendly, even-tempered manner but with a lesser urge for activity.