Teacup Dog Carriers Can You Bring A Tiny Teacup Puppy On A Flight With You? If You Have One Of Those Airline Approved Carriers?

Can you bring a tiny teacup puppy on a flight with you? If you have one of those airline approved carriers? - teacup dog carriers

Does anybody know if there is a small dog, £ 5 on a flight? Will I be charged? How do I find this information?