I haven't noticed anything different with feeding Caesar guinea pigs. What have you heard? And yeah, even with Caesar, a XL guinea pig lump is gone in a few days too but it still seems to keep him quiet although Caesar is pretty needy lol. Sometimes he really wants to 'hang out' so he will push until you slide open a door and then he will park himself in front of the open door and curl up by it as I pet him haha.