Yeah I know the one, the 'No Strings' Episode. His dogs name is Roca, she's half Maltese, half Lhasa Apso (JC just loves his Maltese girls (I'm from a Maltese background hehe)) and according to JC 'she's crazy'. In the video, the dog was going mental running onto the tennis courts and running away with the tennis balls. She's adorable. And she's the one on JC's racquet, and inside his coat.
Yes, she is such a lovable, crazy bundle of fur!