This may come off as a silly question if I may have missed something blatantly obvious in the first book, but do the Muggles of King's Cross station suspect anything weird about the Hogwarts students especially about how they drag their luggage around whilst carrying around their pets?

Wouldn't people on the Muggle side of the station question why students would bring pets aboard trains? I'm not aware of the rules when boarding trains in England but isn't it a common rule for animals/pets to be left off trains?