Is there such thing as a teacup King Charles cavalier?

Answer 1

Probably, and if not, there will be one one day. Dogs constantly breed new species. No there isn't but you can get King Charles Spaniels (not Cavalier) and the tend to be smaller than their Cavalier King Charles cousins

Answer 2

There is no recognized variation of the King Charles Cavalier Spaniel breed called a teacup King Charles Cavalier. "Teacup" is a term often used by breeders to describe smaller versions of certain Dog Breeds, but it is not an official classification. It is important to be cautious when dealing with breeders who market dogs as teacup breeds, as they may be breeding for size rather than the health and well-being of the dogs.