This is my 2nd Dog La-La, diagnosed with Heart Disease last year, she's 10yrs old. She's a King Charle's Tri-Color Cavalier. The doctor said she dosn't know how La-La made it this long. She does NOT have 1 mean bone in her body, sweetest dog in the world, until she sense's a deer, then she goes crazy, and starts to dig her feet in dirt and grass like she wants to attack.